ppapi/proxy/ppb_instance_proxy.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/proxy/ppb_instance_proxy.h"
   6
   7 #include "base/memory/ref_counted.h"
   8 #include "base/numerics/safe_conversions.h"
   9 #include "base/stl_util.h"
  10 #include "build/build_config.h"
  11 #include "media/base/limits.h"
  12 #include "ppapi/c/pp_errors.h"
  13 #include "ppapi/c/pp_time.h"
  14 #include "ppapi/c/pp_var.h"
  15 #include "ppapi/c/ppb_audio_config.h"
  16 #include "ppapi/c/ppb_instance.h"
  17 #include "ppapi/c/ppb_messaging.h"
  18 #include "ppapi/c/ppb_mouse_lock.h"
  19 #include "ppapi/c/private/pp_content_decryptor.h"
  20 #include "ppapi/proxy/broker_resource.h"
  21 #include "ppapi/proxy/browser_font_singleton_resource.h"
  22 #include "ppapi/proxy/content_decryptor_private_serializer.h"
  23 #include "ppapi/proxy/enter_proxy.h"
  24 #include "ppapi/proxy/flash_clipboard_resource.h"
  25 #include "ppapi/proxy/flash_file_resource.h"
  26 #include "ppapi/proxy/flash_fullscreen_resource.h"
  27 #include "ppapi/proxy/flash_resource.h"
  28 #include "ppapi/proxy/gamepad_resource.h"
  29 #include "ppapi/proxy/host_dispatcher.h"
  30 #include "ppapi/proxy/isolated_file_system_private_resource.h"
  31 #include "ppapi/proxy/message_handler.h"
  32 #include "ppapi/proxy/network_proxy_resource.h"
  33 #include "ppapi/proxy/pdf_resource.h"
  34 #include "ppapi/proxy/plugin_dispatcher.h"
  35 #include "ppapi/proxy/ppapi_messages.h"
  36 #include "ppapi/proxy/serialized_var.h"
  37 #include "ppapi/proxy/truetype_font_singleton_resource.h"
  38 #include "ppapi/proxy/uma_private_resource.h"
  39 #include "ppapi/shared_impl/array_var.h"
  40 #include "ppapi/shared_impl/ppapi_globals.h"
  41 #include "ppapi/shared_impl/ppb_url_util_shared.h"
  42 #include "ppapi/shared_impl/ppb_view_shared.h"
  43 #include "ppapi/shared_impl/scoped_pp_var.h"
  44 #include "ppapi/shared_impl/var.h"
  45 #include "ppapi/thunk/enter.h"
  46 #include "ppapi/thunk/ppb_compositor_api.h"
  47 #include "ppapi/thunk/ppb_graphics_2d_api.h"
  48 #include "ppapi/thunk/ppb_graphics_3d_api.h"
  49 #include "ppapi/thunk/thunk.h"
  50
  51 // Windows headers interfere with this file.
  52 #ifdef PostMessage
  53 #undef PostMessage
  54 #endif
  55
  56 using ppapi::thunk::EnterInstanceNoLock;
  57 using ppapi::thunk::EnterResourceNoLock;
  58 using ppapi::thunk::PPB_Compositor_API;
  59 using ppapi::thunk::PPB_Graphics2D_API;
  60 using ppapi::thunk::PPB_Graphics3D_API;
  61 using ppapi::thunk::PPB_Instance_API;
  62
  63 namespace ppapi {
  64 namespace proxy {
  65
  66 namespace {
  67
  68 #if !defined(OS_NACL)
  69 const char kSerializationError[] = "Failed to convert a PostMessage "
  70     "argument from a PP_Var to a Javascript value. It may have cycles or be of "
  71     "an unsupported type.";
  72 #endif
  73
  74 void RequestSurroundingText(PP_Instance instance) {
  75   PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
  76   if (!dispatcher)
  77     return;  // Instance has gone away while message was pending.
  78
  79   InstanceData* data = dispatcher->GetInstanceData(instance);
  80   DCHECK(data);  // Should have it, since we still have a dispatcher.
  81   data->is_request_surrounding_text_pending = false;
  82   if (!data->should_do_request_surrounding_text)
  83     return;
  84
  85   // Just fake out a RequestSurroundingText message to the proxy for the PPP
  86   // interface.
  87   InterfaceProxy* proxy = dispatcher->GetInterfaceProxy(API_ID_PPP_TEXT_INPUT);
  88   if (!proxy)
  89     return;
  90   proxy->OnMessageReceived(PpapiMsg_PPPTextInput_RequestSurroundingText(
  91       API_ID_PPP_TEXT_INPUT, instance,
  92       PPB_Instance_Shared::kExtraCharsForTextInput));
  93 }
  94
  95 }  // namespace
  96
  97 PPB_Instance_Proxy::PPB_Instance_Proxy(Dispatcher* dispatcher)
  98     : InterfaceProxy(dispatcher),
  99       callback_factory_(this) {
 100 }
 101
 102 PPB_Instance_Proxy::~PPB_Instance_Proxy() {
 103 }
 104
 105 bool PPB_Instance_Proxy::OnMessageReceived(const IPC::Message& msg) {
 106   // Prevent the dispatcher from going away during a call to ExecuteScript.
 107   // This must happen OUTSIDE of ExecuteScript since the SerializedVars use
 108   // the dispatcher upon return of the function (converting the
 109   // SerializedVarReturnValue/OutParam to a SerializedVar in the destructor).
 110 #if !defined(OS_NACL)
 111   ScopedModuleReference death_grip(dispatcher());
 112 #endif
 113
 114   bool handled = true;
 115   IPC_BEGIN_MESSAGE_MAP(PPB_Instance_Proxy, msg)
 116 #if !defined(OS_NACL)
 117     // Plugin -> Host messages.
 118     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetWindowObject,
 119                         OnHostMsgGetWindowObject)
 120     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetOwnerElementObject,
 121                         OnHostMsgGetOwnerElementObject)
 122     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_BindGraphics,
 123                         OnHostMsgBindGraphics)
 124     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_IsFullFrame,
 125                         OnHostMsgIsFullFrame)
 126     IPC_MESSAGE_HANDLER(
 127         PpapiHostMsg_PPBInstance_GetAudioHardwareOutputSampleRate,
 128         OnHostMsgGetAudioHardwareOutputSampleRate)
 129     IPC_MESSAGE_HANDLER(
 130         PpapiHostMsg_PPBInstance_GetAudioHardwareOutputBufferSize,
 131         OnHostMsgGetAudioHardwareOutputBufferSize)
 132     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_ExecuteScript,
 133                         OnHostMsgExecuteScript)
 134     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetDefaultCharSet,
 135                         OnHostMsgGetDefaultCharSet)
 136     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetPluginToHandleFindRequests,
 137                         OnHostMsgSetPluginToHandleFindRequests);
 138     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_NumberOfFindResultsChanged,
 139                         OnHostMsgNumberOfFindResultsChanged)
 140     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SelectFindResultChanged,
 141                         OnHostMsgSelectFindResultChanged)
 142     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetTickmarks,
 143                         OnHostMsgSetTickmarks)
 144     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_PostMessage,
 145                         OnHostMsgPostMessage)
 146     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetFullscreen,
 147                         OnHostMsgSetFullscreen)
 148     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetScreenSize,
 149                         OnHostMsgGetScreenSize)
 150     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_RequestInputEvents,
 151                         OnHostMsgRequestInputEvents)
 152     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_ClearInputEvents,
 153                         OnHostMsgClearInputEvents)
 154     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_StartTrackingLatency,
 155                         OnHostMsgStartTrackingLatency)
 156     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_LockMouse,
 157                         OnHostMsgLockMouse)
 158     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_UnlockMouse,
 159                         OnHostMsgUnlockMouse)
 160     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetCursor,
 161                         OnHostMsgSetCursor)
 162     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetTextInputType,
 163                         OnHostMsgSetTextInputType)
 164     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_UpdateCaretPosition,
 165                         OnHostMsgUpdateCaretPosition)
 166     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_CancelCompositionText,
 167                         OnHostMsgCancelCompositionText)
 168     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_UpdateSurroundingText,
 169                         OnHostMsgUpdateSurroundingText)
 170     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetDocumentURL,
 171                         OnHostMsgGetDocumentURL)
 172     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_ResolveRelativeToDocument,
 173                         OnHostMsgResolveRelativeToDocument)
 174     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DocumentCanRequest,
 175                         OnHostMsgDocumentCanRequest)
 176     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DocumentCanAccessDocument,
 177                         OnHostMsgDocumentCanAccessDocument)
 178     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetPluginInstanceURL,
 179                         OnHostMsgGetPluginInstanceURL)
 180     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetPluginReferrerURL,
 181                         OnHostMsgGetPluginReferrerURL)
 182     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_PromiseResolved,
 183                         OnHostMsgPromiseResolved)
 184     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_PromiseResolvedWithSession,
 185                         OnHostMsgPromiseResolvedWithSession)
 186     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_PromiseRejected,
 187                         OnHostMsgPromiseRejected)
 188     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionMessage,
 189                         OnHostMsgSessionMessage)
 190     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionKeysChange,
 191                         OnHostMsgSessionKeysChange)
 192     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionExpirationChange,
 193                         OnHostMsgSessionExpirationChange)
 194     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionClosed,
 195                         OnHostMsgSessionClosed)
 196     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_LegacySessionError,
 197                         OnHostMsgLegacySessionError)
 198     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DeliverBlock,
 199                         OnHostMsgDeliverBlock)
 200     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DecoderInitializeDone,
 201                         OnHostMsgDecoderInitializeDone)
 202     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DecoderDeinitializeDone,
 203                         OnHostMsgDecoderDeinitializeDone)
 204     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DecoderResetDone,
 205                         OnHostMsgDecoderResetDone)
 206     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DeliverFrame,
 207                         OnHostMsgDeliverFrame)
 208     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DeliverSamples,
 209                         OnHostMsgDeliverSamples)
 210 #endif  // !defined(OS_NACL)
 211
 212     // Host -> Plugin messages.
 213     IPC_MESSAGE_HANDLER(PpapiMsg_PPBInstance_MouseLockComplete,
 214                         OnPluginMsgMouseLockComplete)
 215
 216     IPC_MESSAGE_UNHANDLED(handled = false)
 217   IPC_END_MESSAGE_MAP()
 218   return handled;
 219 }
 220
 221 PP_Bool PPB_Instance_Proxy::BindGraphics(PP_Instance instance,
 222                                          PP_Resource device) {
 223   // If device is 0, pass a null HostResource. This signals the host to unbind
 224   // all devices.
 225   PP_Resource pp_resource = 0;
 226   if (device) {
 227     Resource* resource =
 228         PpapiGlobals::Get()->GetResourceTracker()->GetResource(device);
 229     if (!resource || resource->pp_instance() != instance)
 230       return PP_FALSE;
 231     // We need to pass different resource to Graphics 2D, 3D and Compositor
 232     // right now.  Once 3D is migrated to the new design, we should be able to
 233     // unify this.
 234     if (resource->AsPPB_Graphics3D_API()) {
 235       pp_resource = resource->host_resource().host_resource();
 236     } else if (resource->AsPPB_Graphics2D_API() ||
 237                resource->AsPPB_Compositor_API()) {
 238       pp_resource = resource->pp_resource();
 239     } else {
 240       // A bad resource.
 241       return PP_FALSE;
 242     }
 243   }
 244   dispatcher()->Send(new PpapiHostMsg_PPBInstance_BindGraphics(
 245         API_ID_PPB_INSTANCE, instance, pp_resource));
 246   return PP_TRUE;
 247 }
 248
 249 PP_Bool PPB_Instance_Proxy::IsFullFrame(PP_Instance instance) {
 250   PP_Bool result = PP_FALSE;
 251   dispatcher()->Send(new PpapiHostMsg_PPBInstance_IsFullFrame(
 252       API_ID_PPB_INSTANCE, instance, &result));
 253   return result;
 254 }
 255
 256 const ViewData* PPB_Instance_Proxy::GetViewData(PP_Instance instance) {
 257   InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
 258       GetInstanceData(instance);
 259   if (!data)
 260     return NULL;
 261   return &data->view;
 262 }
 263
 264 PP_Bool PPB_Instance_Proxy::FlashIsFullscreen(PP_Instance instance) {
 265   // This function is only used for proxying in the renderer process. It is not
 266   // implemented in the plugin process.
 267   NOTREACHED();
 268   return PP_FALSE;
 269 }
 270
 271 PP_Var PPB_Instance_Proxy::GetWindowObject(PP_Instance instance) {
 272   ReceiveSerializedVarReturnValue result;
 273   dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetWindowObject(
 274       API_ID_PPB_INSTANCE, instance, &result));
 275   return result.Return(dispatcher());
 276 }
 277
 278 PP_Var PPB_Instance_Proxy::GetOwnerElementObject(PP_Instance instance) {
 279   ReceiveSerializedVarReturnValue result;
 280   dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetOwnerElementObject(
 281       API_ID_PPB_INSTANCE, instance, &result));
 282   return result.Return(dispatcher());
 283 }
 284
 285 PP_Var PPB_Instance_Proxy::ExecuteScript(PP_Instance instance,
 286                                          PP_Var script,
 287                                          PP_Var* exception) {
 288   ReceiveSerializedException se(dispatcher(), exception);
 289   if (se.IsThrown())
 290     return PP_MakeUndefined();
 291
 292   ReceiveSerializedVarReturnValue result;
 293   dispatcher()->Send(new PpapiHostMsg_PPBInstance_ExecuteScript(
 294       API_ID_PPB_INSTANCE, instance,
 295       SerializedVarSendInput(dispatcher(), script), &se, &result));
 296   return result.Return(dispatcher());
 297 }
 298
 299 uint32_t PPB_Instance_Proxy::GetAudioHardwareOutputSampleRate(
 300     PP_Instance instance) {
 301   uint32_t result = PP_AUDIOSAMPLERATE_NONE;
 302   dispatcher()->Send(
 303       new PpapiHostMsg_PPBInstance_GetAudioHardwareOutputSampleRate(
 304           API_ID_PPB_INSTANCE, instance, &result));
 305   return result;
 306 }
 307
 308 uint32_t PPB_Instance_Proxy::GetAudioHardwareOutputBufferSize(
 309     PP_Instance instance) {
 310   uint32_t result = 0;
 311   dispatcher()->Send(
 312       new PpapiHostMsg_PPBInstance_GetAudioHardwareOutputBufferSize(
 313           API_ID_PPB_INSTANCE, instance, &result));
 314   return result;
 315 }
 316
 317 PP_Var PPB_Instance_Proxy::GetDefaultCharSet(PP_Instance instance) {
 318   PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
 319   if (!dispatcher)
 320     return PP_MakeUndefined();
 321
 322   ReceiveSerializedVarReturnValue result;
 323   dispatcher->Send(new PpapiHostMsg_PPBInstance_GetDefaultCharSet(
 324       API_ID_PPB_INSTANCE, instance, &result));
 325   return result.Return(dispatcher);
 326 }
 327
 328 void PPB_Instance_Proxy::SetPluginToHandleFindRequests(PP_Instance instance) {
 329   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetPluginToHandleFindRequests(
 330       API_ID_PPB_INSTANCE, instance));
 331 }
 332
 333 void PPB_Instance_Proxy::NumberOfFindResultsChanged(PP_Instance instance,
 334                                                     int32_t total,
 335                                                     PP_Bool final_result) {
 336   dispatcher()->Send(new PpapiHostMsg_PPBInstance_NumberOfFindResultsChanged(
 337       API_ID_PPB_INSTANCE, instance, total, final_result));
 338 }
 339
 340 void PPB_Instance_Proxy::SelectedFindResultChanged(PP_Instance instance,
 341                                                    int32_t index) {
 342   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SelectFindResultChanged(
 343       API_ID_PPB_INSTANCE, instance, index));
 344 }
 345
 346 void PPB_Instance_Proxy::SetTickmarks(PP_Instance instance,
 347                                       const PP_Rect* tickmarks,
 348                                       uint32_t count) {
 349   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetTickmarks(
 350       API_ID_PPB_INSTANCE, instance,
 351       std::vector<PP_Rect>(tickmarks, tickmarks + count)));
 352 }
 353
 354 PP_Bool PPB_Instance_Proxy::IsFullscreen(PP_Instance instance) {
 355   InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
 356       GetInstanceData(instance);
 357   if (!data)
 358     return PP_FALSE;
 359   return PP_FromBool(data->view.is_fullscreen);
 360 }
 361
 362 PP_Bool PPB_Instance_Proxy::SetFullscreen(PP_Instance instance,
 363                                           PP_Bool fullscreen) {
 364   PP_Bool result = PP_FALSE;
 365   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetFullscreen(
 366       API_ID_PPB_INSTANCE, instance, fullscreen, &result));
 367   return result;
 368 }
 369
 370 PP_Bool PPB_Instance_Proxy::GetScreenSize(PP_Instance instance,
 371                                           PP_Size* size) {
 372   PP_Bool result = PP_FALSE;
 373   dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetScreenSize(
 374       API_ID_PPB_INSTANCE, instance, &result, size));
 375   return result;
 376 }
 377
 378 Resource* PPB_Instance_Proxy::GetSingletonResource(PP_Instance instance,
 379                                                    SingletonResourceID id) {
 380   InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
 381       GetInstanceData(instance);
 382
 383   InstanceData::SingletonResourceMap::iterator it =
 384       data->singleton_resources.find(id);
 385   if (it != data->singleton_resources.end())
 386     return it->second.get();
 387
 388   scoped_refptr<Resource> new_singleton;
 389   Connection connection(PluginGlobals::Get()->GetBrowserSender(), dispatcher());
 390
 391   switch (id) {
 392     case BROKER_SINGLETON_ID:
 393       new_singleton = new BrokerResource(connection, instance);
 394       break;
 395     case GAMEPAD_SINGLETON_ID:
 396       new_singleton = new GamepadResource(connection, instance);
 397       break;
 398     case ISOLATED_FILESYSTEM_SINGLETON_ID:
 399       new_singleton =
 400           new IsolatedFileSystemPrivateResource(connection, instance);
 401       break;
 402     case NETWORK_PROXY_SINGLETON_ID:
 403       new_singleton = new NetworkProxyResource(connection, instance);
 404       break;
 405     case TRUETYPE_FONT_SINGLETON_ID:
 406       new_singleton = new TrueTypeFontSingletonResource(connection, instance);
 407       break;
 408     case UMA_SINGLETON_ID:
 409       new_singleton = new UMAPrivateResource(connection, instance);
 410       break;
 411 // Flash/trusted resources aren't needed for NaCl.
 412 #if !defined(OS_NACL) && !defined(NACL_WIN64)
 413     case BROWSER_FONT_SINGLETON_ID:
 414       new_singleton = new BrowserFontSingletonResource(connection, instance);
 415       break;
 416     case FLASH_CLIPBOARD_SINGLETON_ID:
 417       new_singleton = new FlashClipboardResource(connection, instance);
 418       break;
 419     case FLASH_FILE_SINGLETON_ID:
 420       new_singleton = new FlashFileResource(connection, instance);
 421       break;
 422     case FLASH_FULLSCREEN_SINGLETON_ID:
 423       new_singleton = new FlashFullscreenResource(connection, instance);
 424       break;
 425     case FLASH_SINGLETON_ID:
 426       new_singleton = new FlashResource(connection, instance,
 427           static_cast<PluginDispatcher*>(dispatcher()));
 428       break;
 429     case PDF_SINGLETON_ID:
 430       new_singleton = new PDFResource(connection, instance);
 431       break;
 432 #else
 433     case BROWSER_FONT_SINGLETON_ID:
 434     case FLASH_CLIPBOARD_SINGLETON_ID:
 435     case FLASH_FILE_SINGLETON_ID:
 436     case FLASH_FULLSCREEN_SINGLETON_ID:
 437     case FLASH_SINGLETON_ID:
 438     case PDF_SINGLETON_ID:
 439       NOTREACHED();
 440       break;
 441 #endif  // !defined(OS_NACL) && !defined(NACL_WIN64)
 442   }
 443
 444   if (!new_singleton.get()) {
 445     // Getting here implies that a constructor is missing in the above switch.
 446     NOTREACHED();
 447     return NULL;
 448   }
 449
 450   data->singleton_resources[id] = new_singleton;
 451   return new_singleton.get();
 452 }
 453
 454 int32_t PPB_Instance_Proxy::RequestInputEvents(PP_Instance instance,
 455                                                uint32_t event_classes) {
 456   dispatcher()->Send(new PpapiHostMsg_PPBInstance_RequestInputEvents(
 457       API_ID_PPB_INSTANCE, instance, false, event_classes));
 458
 459   // We always register for the classes we can handle, this function validates
 460   // the flags so we can notify it if anything was invalid, without requiring
 461   // a sync reply.
 462   return ValidateRequestInputEvents(false, event_classes);
 463 }
 464
 465 int32_t PPB_Instance_Proxy::RequestFilteringInputEvents(
 466     PP_Instance instance,
 467     uint32_t event_classes) {
 468   dispatcher()->Send(new PpapiHostMsg_PPBInstance_RequestInputEvents(
 469       API_ID_PPB_INSTANCE, instance, true, event_classes));
 470
 471   // We always register for the classes we can handle, this function validates
 472   // the flags so we can notify it if anything was invalid, without requiring
 473   // a sync reply.
 474   return ValidateRequestInputEvents(true, event_classes);
 475 }
 476
 477 void PPB_Instance_Proxy::ClearInputEventRequest(PP_Instance instance,
 478                                                 uint32_t event_classes) {
 479   dispatcher()->Send(new PpapiHostMsg_PPBInstance_ClearInputEvents(
 480       API_ID_PPB_INSTANCE, instance, event_classes));
 481 }
 482
 483 void PPB_Instance_Proxy::StartTrackingLatency(PP_Instance instance) {
 484   dispatcher()->Send(new PpapiHostMsg_PPBInstance_StartTrackingLatency(
 485       API_ID_PPB_INSTANCE, instance));
 486 }
 487
 488 PP_Var PPB_Instance_Proxy::GetDocumentURL(PP_Instance instance,
 489                                           PP_URLComponents_Dev* components) {
 490   ReceiveSerializedVarReturnValue result;
 491   PP_URLComponents_Dev url_components = {{0}};
 492   dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetDocumentURL(
 493       API_ID_PPB_INSTANCE, instance, &url_components, &result));
 494   if (components)
 495     *components = url_components;
 496   return result.Return(dispatcher());
 497 }
 498
 499 #if !defined(OS_NACL)
 500 PP_Var PPB_Instance_Proxy::ResolveRelativeToDocument(
 501     PP_Instance instance,
 502     PP_Var relative,
 503     PP_URLComponents_Dev* components) {
 504   ReceiveSerializedVarReturnValue result;
 505   dispatcher()->Send(new PpapiHostMsg_PPBInstance_ResolveRelativeToDocument(
 506       API_ID_PPB_INSTANCE, instance,
 507       SerializedVarSendInput(dispatcher(), relative),
 508       &result));
 509   return PPB_URLUtil_Shared::ConvertComponentsAndReturnURL(
 510       result.Return(dispatcher()),
 511       components);
 512 }
 513
 514 PP_Bool PPB_Instance_Proxy::DocumentCanRequest(PP_Instance instance,
 515                                                PP_Var url) {
 516   PP_Bool result = PP_FALSE;
 517   dispatcher()->Send(new PpapiHostMsg_PPBInstance_DocumentCanRequest(
 518       API_ID_PPB_INSTANCE, instance,
 519       SerializedVarSendInput(dispatcher(), url),
 520       &result));
 521   return result;
 522 }
 523
 524 PP_Bool PPB_Instance_Proxy::DocumentCanAccessDocument(PP_Instance instance,
 525                                                       PP_Instance target) {
 526   PP_Bool result = PP_FALSE;
 527   dispatcher()->Send(new PpapiHostMsg_PPBInstance_DocumentCanAccessDocument(
 528       API_ID_PPB_INSTANCE, instance, target, &result));
 529   return result;
 530 }
 531
 532 PP_Var PPB_Instance_Proxy::GetPluginInstanceURL(
 533       PP_Instance instance,
 534       PP_URLComponents_Dev* components) {
 535   ReceiveSerializedVarReturnValue result;
 536   dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetPluginInstanceURL(
 537       API_ID_PPB_INSTANCE, instance, &result));
 538   return PPB_URLUtil_Shared::ConvertComponentsAndReturnURL(
 539       result.Return(dispatcher()),
 540       components);
 541 }
 542
 543 PP_Var PPB_Instance_Proxy::GetPluginReferrerURL(
 544       PP_Instance instance,
 545       PP_URLComponents_Dev* components) {
 546   ReceiveSerializedVarReturnValue result;
 547   dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetPluginReferrerURL(
 548       API_ID_PPB_INSTANCE, instance, &result));
 549   return PPB_URLUtil_Shared::ConvertComponentsAndReturnURL(
 550       result.Return(dispatcher()),
 551       components);
 552 }
 553
 554 void PPB_Instance_Proxy::PromiseResolved(PP_Instance instance,
 555                                          uint32 promise_id) {
 556   dispatcher()->Send(new PpapiHostMsg_PPBInstance_PromiseResolved(
 557       API_ID_PPB_INSTANCE, instance, promise_id));
 558 }
 559
 560 void PPB_Instance_Proxy::PromiseResolvedWithSession(PP_Instance instance,
 561                                                     uint32 promise_id,
 562                                                     PP_Var session_id_var) {
 563   dispatcher()->Send(new PpapiHostMsg_PPBInstance_PromiseResolvedWithSession(
 564       API_ID_PPB_INSTANCE, instance, promise_id,
 565       SerializedVarSendInput(dispatcher(), session_id_var)));
 566 }
 567
 568 void PPB_Instance_Proxy::PromiseRejected(PP_Instance instance,
 569                                          uint32 promise_id,
 570                                          PP_CdmExceptionCode exception_code,
 571                                          uint32 system_code,
 572                                          PP_Var error_description_var) {
 573   dispatcher()->Send(new PpapiHostMsg_PPBInstance_PromiseRejected(
 574       API_ID_PPB_INSTANCE,
 575       instance,
 576       promise_id,
 577       exception_code,
 578       system_code,
 579       SerializedVarSendInput(dispatcher(), error_description_var)));
 580 }
 581
 582 void PPB_Instance_Proxy::SessionMessage(PP_Instance instance,
 583                                         PP_Var session_id_var,
 584                                         PP_CdmMessageType message_type,
 585                                         PP_Var message_var,
 586                                         PP_Var legacy_destination_url_var) {
 587   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionMessage(
 588       API_ID_PPB_INSTANCE, instance,
 589       SerializedVarSendInput(dispatcher(), session_id_var), message_type,
 590       SerializedVarSendInput(dispatcher(), message_var),
 591       SerializedVarSendInput(dispatcher(), legacy_destination_url_var)));
 592 }
 593
 594 void PPB_Instance_Proxy::SessionKeysChange(
 595     PP_Instance instance,
 596     PP_Var session_id_var,
 597     PP_Bool has_additional_usable_key,
 598     uint32_t key_count,
 599     const struct PP_KeyInformation key_information[]) {
 600   StringVar* session_id = StringVar::FromPPVar(session_id_var);
 601   if (!session_id ||
 602       session_id->value().length() > media::limits::kMaxSessionIdLength) {
 603     NOTREACHED();
 604     return;
 605   }
 606
 607   if (key_count > media::limits::kMaxKeyIds) {
 608     NOTREACHED();
 609     return;
 610   }
 611
 612   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionKeysChange(
 613       API_ID_PPB_INSTANCE, instance, session_id->value(),
 614       has_additional_usable_key,
 615       std::vector<PP_KeyInformation>(key_information,
 616                                      key_information + key_count)));
 617 }
 618
 619 void PPB_Instance_Proxy::SessionExpirationChange(PP_Instance instance,
 620                                                  PP_Var session_id_var,
 621                                                  PP_Time new_expiry_time) {
 622   StringVar* session_id = StringVar::FromPPVar(session_id_var);
 623   if (!session_id ||
 624       session_id->value().length() > media::limits::kMaxSessionIdLength) {
 625     NOTREACHED();
 626     return;
 627   }
 628
 629   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionExpirationChange(
 630       API_ID_PPB_INSTANCE, instance, session_id->value(), new_expiry_time));
 631 }
 632
 633 void PPB_Instance_Proxy::SessionClosed(PP_Instance instance,
 634                                        PP_Var session_id_var) {
 635   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionClosed(
 636       API_ID_PPB_INSTANCE, instance,
 637       SerializedVarSendInput(dispatcher(), session_id_var)));
 638 }
 639
 640 void PPB_Instance_Proxy::LegacySessionError(PP_Instance instance,
 641                                             PP_Var session_id_var,
 642                                             PP_CdmExceptionCode exception_code,
 643                                             uint32 system_code,
 644                                             PP_Var error_description_var) {
 645   dispatcher()->Send(new PpapiHostMsg_PPBInstance_LegacySessionError(
 646       API_ID_PPB_INSTANCE, instance,
 647       SerializedVarSendInput(dispatcher(), session_id_var), exception_code,
 648       system_code,
 649       SerializedVarSendInput(dispatcher(), error_description_var)));
 650 }
 651
 652 void PPB_Instance_Proxy::DeliverBlock(PP_Instance instance,
 653                                       PP_Resource decrypted_block,
 654                                       const PP_DecryptedBlockInfo* block_info) {
 655   PP_Resource decrypted_block_host_resource = 0;
 656
 657   if (decrypted_block) {
 658     Resource* object =
 659         PpapiGlobals::Get()->GetResourceTracker()->GetResource(decrypted_block);
 660     if (!object || object->pp_instance() != instance) {
 661       NOTREACHED();
 662       return;
 663     }
 664     decrypted_block_host_resource = object->host_resource().host_resource();
 665   }
 666
 667   std::string serialized_block_info;
 668   if (!SerializeBlockInfo(*block_info, &serialized_block_info)) {
 669     NOTREACHED();
 670     return;
 671   }
 672
 673   dispatcher()->Send(
 674       new PpapiHostMsg_PPBInstance_DeliverBlock(API_ID_PPB_INSTANCE,
 675           instance,
 676           decrypted_block_host_resource,
 677           serialized_block_info));
 678 }
 679
 680 void PPB_Instance_Proxy::DecoderInitializeDone(
 681     PP_Instance instance,
 682     PP_DecryptorStreamType decoder_type,
 683     uint32_t request_id,
 684     PP_Bool success) {
 685   dispatcher()->Send(
 686       new PpapiHostMsg_PPBInstance_DecoderInitializeDone(
 687           API_ID_PPB_INSTANCE,
 688           instance,
 689           decoder_type,
 690           request_id,
 691           success));
 692 }
 693
 694 void PPB_Instance_Proxy::DecoderDeinitializeDone(
 695     PP_Instance instance,
 696     PP_DecryptorStreamType decoder_type,
 697     uint32_t request_id) {
 698   dispatcher()->Send(
 699       new PpapiHostMsg_PPBInstance_DecoderDeinitializeDone(
 700           API_ID_PPB_INSTANCE,
 701           instance,
 702           decoder_type,
 703           request_id));
 704 }
 705
 706 void PPB_Instance_Proxy::DecoderResetDone(PP_Instance instance,
 707                                           PP_DecryptorStreamType decoder_type,
 708                                           uint32_t request_id) {
 709   dispatcher()->Send(
 710       new PpapiHostMsg_PPBInstance_DecoderResetDone(
 711           API_ID_PPB_INSTANCE,
 712           instance,
 713           decoder_type,
 714           request_id));
 715 }
 716
 717 void PPB_Instance_Proxy::DeliverFrame(PP_Instance instance,
 718                                       PP_Resource decrypted_frame,
 719                                       const PP_DecryptedFrameInfo* frame_info) {
 720   PP_Resource host_resource = 0;
 721   if (decrypted_frame != 0) {
 722     ResourceTracker* tracker = PpapiGlobals::Get()->GetResourceTracker();
 723     Resource* object = tracker->GetResource(decrypted_frame);
 724
 725     if (!object || object->pp_instance() != instance) {
 726       NOTREACHED();
 727       return;
 728     }
 729
 730     host_resource = object->host_resource().host_resource();
 731   }
 732
 733   std::string serialized_frame_info;
 734   if (!SerializeBlockInfo(*frame_info, &serialized_frame_info)) {
 735     NOTREACHED();
 736     return;
 737   }
 738
 739   dispatcher()->Send(
 740       new PpapiHostMsg_PPBInstance_DeliverFrame(API_ID_PPB_INSTANCE,
 741                                                 instance,
 742                                                 host_resource,
 743                                                 serialized_frame_info));
 744 }
 745
 746 void PPB_Instance_Proxy::DeliverSamples(
 747     PP_Instance instance,
 748     PP_Resource decrypted_samples,
 749     const PP_DecryptedSampleInfo* sample_info) {
 750   PP_Resource host_resource = 0;
 751   if (decrypted_samples != 0) {
 752     ResourceTracker* tracker = PpapiGlobals::Get()->GetResourceTracker();
 753     Resource* object = tracker->GetResource(decrypted_samples);
 754
 755     if (!object || object->pp_instance() != instance) {
 756       NOTREACHED();
 757       return;
 758     }
 759
 760     host_resource = object->host_resource().host_resource();
 761   }
 762
 763   std::string serialized_sample_info;
 764   if (!SerializeBlockInfo(*sample_info, &serialized_sample_info)) {
 765     NOTREACHED();
 766     return;
 767   }
 768
 769   dispatcher()->Send(
 770       new PpapiHostMsg_PPBInstance_DeliverSamples(API_ID_PPB_INSTANCE,
 771                                                   instance,
 772                                                   host_resource,
 773                                                   serialized_sample_info));
 774 }
 775 #endif  // !defined(OS_NACL)
 776
 777 void PPB_Instance_Proxy::PostMessage(PP_Instance instance,
 778                                      PP_Var message) {
 779   dispatcher()->Send(new PpapiHostMsg_PPBInstance_PostMessage(
 780       API_ID_PPB_INSTANCE,
 781       instance, SerializedVarSendInputShmem(dispatcher(), message,
 782                                             instance)));
 783 }
 784
 785 int32_t PPB_Instance_Proxy::RegisterMessageHandler(
 786     PP_Instance instance,
 787     void* user_data,
 788     const PPP_MessageHandler_0_2* handler,
 789     PP_Resource message_loop) {
 790   InstanceData* data =
 791       static_cast<PluginDispatcher*>(dispatcher())->GetInstanceData(instance);
 792   if (!data)
 793     return PP_ERROR_BADARGUMENT;
 794
 795   int32_t result = PP_ERROR_FAILED;
 796   scoped_ptr<MessageHandler> message_handler = MessageHandler::Create(
 797       instance, handler, user_data, message_loop, &result);
 798   if (message_handler)
 799     data->message_handler = message_handler.Pass();
 800   return result;
 801 }
 802
 803 void PPB_Instance_Proxy::UnregisterMessageHandler(PP_Instance instance) {
 804   InstanceData* data =
 805       static_cast<PluginDispatcher*>(dispatcher())->GetInstanceData(instance);
 806   if (!data)
 807     return;
 808   data->message_handler.reset();
 809 }
 810
 811 PP_Bool PPB_Instance_Proxy::SetCursor(PP_Instance instance,
 812                                       PP_MouseCursor_Type type,
 813                                       PP_Resource image,
 814                                       const PP_Point* hot_spot) {
 815   // Some of these parameters are important for security. This check is in the
 816   // plugin process just for the convenience of the caller (since we don't
 817   // bother returning errors from the other process with a sync message). The
 818   // parameters will be validated again in the renderer.
 819   if (!ValidateSetCursorParams(type, image, hot_spot))
 820     return PP_FALSE;
 821
 822   HostResource image_host_resource;
 823   if (image) {
 824     Resource* cursor_image =
 825         PpapiGlobals::Get()->GetResourceTracker()->GetResource(image);
 826     if (!cursor_image || cursor_image->pp_instance() != instance)
 827       return PP_FALSE;
 828     image_host_resource = cursor_image->host_resource();
 829   }
 830
 831   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetCursor(
 832       API_ID_PPB_INSTANCE, instance, static_cast<int32_t>(type),
 833       image_host_resource, hot_spot ? *hot_spot : PP_MakePoint(0, 0)));
 834   return PP_TRUE;
 835 }
 836
 837 int32_t PPB_Instance_Proxy::LockMouse(PP_Instance instance,
 838                                       scoped_refptr<TrackedCallback> callback) {
 839   // Save the mouse callback on the instance data.
 840   InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
 841       GetInstanceData(instance);
 842   if (!data)
 843     return PP_ERROR_BADARGUMENT;
 844   if (TrackedCallback::IsPending(data->mouse_lock_callback))
 845     return PP_ERROR_INPROGRESS;  // Already have a pending callback.
 846   data->mouse_lock_callback = callback;
 847
 848   dispatcher()->Send(new PpapiHostMsg_PPBInstance_LockMouse(
 849       API_ID_PPB_INSTANCE, instance));
 850   return PP_OK_COMPLETIONPENDING;
 851 }
 852
 853 void PPB_Instance_Proxy::UnlockMouse(PP_Instance instance) {
 854   dispatcher()->Send(new PpapiHostMsg_PPBInstance_UnlockMouse(
 855       API_ID_PPB_INSTANCE, instance));
 856 }
 857
 858 void PPB_Instance_Proxy::SetTextInputType(PP_Instance instance,
 859                                           PP_TextInput_Type type) {
 860   CancelAnyPendingRequestSurroundingText(instance);
 861   dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetTextInputType(
 862       API_ID_PPB_INSTANCE, instance, type));
 863 }
 864
 865 void PPB_Instance_Proxy::UpdateCaretPosition(PP_Instance instance,
 866                                              const PP_Rect& caret,
 867                                              const PP_Rect& bounding_box) {
 868   dispatcher()->Send(new PpapiHostMsg_PPBInstance_UpdateCaretPosition(
 869       API_ID_PPB_INSTANCE, instance, caret, bounding_box));
 870 }
 871
 872 void PPB_Instance_Proxy::CancelCompositionText(PP_Instance instance) {
 873   CancelAnyPendingRequestSurroundingText(instance);
 874   dispatcher()->Send(new PpapiHostMsg_PPBInstance_CancelCompositionText(
 875       API_ID_PPB_INSTANCE, instance));
 876 }
 877
 878 void PPB_Instance_Proxy::SelectionChanged(PP_Instance instance) {
 879   // The "right" way to do this is to send the message to the host. However,
 880   // all it will do is call RequestSurroundingText with a hardcoded number of
 881   // characters in response, which is an entire IPC round-trip.
 882   //
 883   // We can avoid this round-trip by just implementing the
 884   // RequestSurroundingText logic in the plugin process. If the logic in the
 885   // host becomes more complex (like a more adaptive number of characters),
 886   // we'll need to reevanuate whether we want to do the round trip instead.
 887   //
 888   // Be careful to post a task to avoid reentering the plugin.
 889
 890   InstanceData* data =
 891       static_cast<PluginDispatcher*>(dispatcher())->GetInstanceData(instance);
 892   if (!data)
 893     return;
 894   data->should_do_request_surrounding_text = true;
 895
 896   if (!data->is_request_surrounding_text_pending) {
 897     PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 898         FROM_HERE,
 899         RunWhileLocked(base::Bind(&RequestSurroundingText, instance)));
 900     data->is_request_surrounding_text_pending = true;
 901   }
 902 }
 903
 904 void PPB_Instance_Proxy::UpdateSurroundingText(PP_Instance instance,
 905                                                const char* text,
 906                                                uint32_t caret,
 907                                                uint32_t anchor) {
 908   dispatcher()->Send(new PpapiHostMsg_PPBInstance_UpdateSurroundingText(
 909       API_ID_PPB_INSTANCE, instance, text, caret, anchor));
 910 }
 911
 912 #if !defined(OS_NACL)
 913 void PPB_Instance_Proxy::OnHostMsgGetWindowObject(
 914     PP_Instance instance,
 915     SerializedVarReturnValue result) {
 916   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
 917     return;
 918   EnterInstanceNoLock enter(instance);
 919   if (enter.succeeded())
 920     result.Return(dispatcher(), enter.functions()->GetWindowObject(instance));
 921 }
 922
 923 void PPB_Instance_Proxy::OnHostMsgGetOwnerElementObject(
 924     PP_Instance instance,
 925     SerializedVarReturnValue result) {
 926   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
 927     return;
 928   EnterInstanceNoLock enter(instance);
 929   if (enter.succeeded()) {
 930     result.Return(dispatcher(),
 931                   enter.functions()->GetOwnerElementObject(instance));
 932   }
 933 }
 934
 935 void PPB_Instance_Proxy::OnHostMsgBindGraphics(PP_Instance instance,
 936                                                PP_Resource device) {
 937   // Note that we ignroe the return value here. Otherwise, this would need to
 938   // be a slow sync call, and the plugin side of the proxy will have already
 939   // validated the resources, so we shouldn't see errors here that weren't
 940   // already caught.
 941   EnterInstanceNoLock enter(instance);
 942   if (enter.succeeded())
 943     enter.functions()->BindGraphics(instance, device);
 944 }
 945
 946 void PPB_Instance_Proxy::OnHostMsgGetAudioHardwareOutputSampleRate(
 947     PP_Instance instance, uint32_t* result) {
 948   EnterInstanceNoLock enter(instance);
 949   if (enter.succeeded())
 950     *result = enter.functions()->GetAudioHardwareOutputSampleRate(instance);
 951 }
 952
 953 void PPB_Instance_Proxy::OnHostMsgGetAudioHardwareOutputBufferSize(
 954     PP_Instance instance, uint32_t* result) {
 955   EnterInstanceNoLock enter(instance);
 956   if (enter.succeeded())
 957     *result = enter.functions()->GetAudioHardwareOutputBufferSize(instance);
 958 }
 959
 960 void PPB_Instance_Proxy::OnHostMsgIsFullFrame(PP_Instance instance,
 961                                               PP_Bool* result) {
 962   EnterInstanceNoLock enter(instance);
 963   if (enter.succeeded())
 964     *result = enter.functions()->IsFullFrame(instance);
 965 }
 966
 967 void PPB_Instance_Proxy::OnHostMsgExecuteScript(
 968     PP_Instance instance,
 969     SerializedVarReceiveInput script,
 970     SerializedVarOutParam out_exception,
 971     SerializedVarReturnValue result) {
 972   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
 973     return;
 974   EnterInstanceNoLock enter(instance);
 975   if (enter.failed())
 976     return;
 977
 978   if (dispatcher()->IsPlugin())
 979     NOTREACHED();
 980   else
 981     static_cast<HostDispatcher*>(dispatcher())->set_allow_plugin_reentrancy();
 982
 983   result.Return(dispatcher(), enter.functions()->ExecuteScript(
 984       instance,
 985       script.Get(dispatcher()),
 986       out_exception.OutParam(dispatcher())));
 987 }
 988
 989 void PPB_Instance_Proxy::OnHostMsgGetDefaultCharSet(
 990     PP_Instance instance,
 991     SerializedVarReturnValue result) {
 992   if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
 993     return;
 994   EnterInstanceNoLock enter(instance);
 995   if (enter.succeeded())
 996     result.Return(dispatcher(), enter.functions()->GetDefaultCharSet(instance));
 997 }
 998
 999 void PPB_Instance_Proxy::OnHostMsgSetPluginToHandleFindRequests(
1000     PP_Instance instance) {
1001   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1002     return;
1003   EnterInstanceNoLock enter(instance);
1004   if (enter.succeeded())
1005     enter.functions()->SetPluginToHandleFindRequests(instance);
1006 }
1007
1008 void PPB_Instance_Proxy::OnHostMsgNumberOfFindResultsChanged(
1009     PP_Instance instance,
1010     int32_t total,
1011     PP_Bool final_result) {
1012   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1013     return;
1014   EnterInstanceNoLock enter(instance);
1015   if (enter.succeeded()) {
1016     enter.functions()->NumberOfFindResultsChanged(
1017         instance, total, final_result);
1018   }
1019 }
1020
1021 void PPB_Instance_Proxy::OnHostMsgSelectFindResultChanged(
1022     PP_Instance instance,
1023     int32_t index) {
1024   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1025     return;
1026   EnterInstanceNoLock enter(instance);
1027   if (enter.succeeded())
1028     enter.functions()->SelectedFindResultChanged(instance, index);
1029 }
1030
1031 void PPB_Instance_Proxy::OnHostMsgSetTickmarks(
1032     PP_Instance instance,
1033     const std::vector<PP_Rect>& tickmarks) {
1034   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1035     return;
1036   const PP_Rect* array = tickmarks.empty() ? NULL : &tickmarks[0];
1037   EnterInstanceNoLock enter(instance);
1038   if (enter.succeeded()) {
1039     enter.functions()->SetTickmarks(instance,
1040                                     array,
1041                                     static_cast<uint32_t>(tickmarks.size()));
1042   }
1043 }
1044
1045 void PPB_Instance_Proxy::OnHostMsgSetFullscreen(PP_Instance instance,
1046                                                 PP_Bool fullscreen,
1047                                                 PP_Bool* result) {
1048   EnterInstanceNoLock enter(instance);
1049   if (enter.succeeded())
1050     *result = enter.functions()->SetFullscreen(instance, fullscreen);
1051 }
1052
1053
1054 void PPB_Instance_Proxy::OnHostMsgGetScreenSize(PP_Instance instance,
1055                                                 PP_Bool* result,
1056                                                 PP_Size* size) {
1057   EnterInstanceNoLock enter(instance);
1058   if (enter.succeeded())
1059     *result = enter.functions()->GetScreenSize(instance, size);
1060 }
1061
1062 void PPB_Instance_Proxy::OnHostMsgRequestInputEvents(PP_Instance instance,
1063                                                      bool is_filtering,
1064                                                      uint32_t event_classes) {
1065   EnterInstanceNoLock enter(instance);
1066   if (enter.succeeded()) {
1067     if (is_filtering)
1068       enter.functions()->RequestFilteringInputEvents(instance, event_classes);
1069     else
1070       enter.functions()->RequestInputEvents(instance, event_classes);
1071   }
1072 }
1073
1074 void PPB_Instance_Proxy::OnHostMsgClearInputEvents(PP_Instance instance,
1075                                                    uint32_t event_classes) {
1076   EnterInstanceNoLock enter(instance);
1077   if (enter.succeeded())
1078     enter.functions()->ClearInputEventRequest(instance, event_classes);
1079 }
1080
1081 void PPB_Instance_Proxy::OnHostMsgStartTrackingLatency(PP_Instance instance) {
1082   EnterInstanceNoLock enter(instance);
1083   if (enter.succeeded())
1084     enter.functions()->StartTrackingLatency(instance);
1085 }
1086
1087 void PPB_Instance_Proxy::OnHostMsgPostMessage(
1088     PP_Instance instance,
1089     SerializedVarReceiveInput message) {
1090   EnterInstanceNoLock enter(instance);
1091   if (!message.is_valid_var()) {
1092     PpapiGlobals::Get()->LogWithSource(
1093         instance, PP_LOGLEVEL_ERROR, std::string(), kSerializationError);
1094     return;
1095   }
1096
1097   if (enter.succeeded())
1098     enter.functions()->PostMessage(instance,
1099                                    message.GetForInstance(dispatcher(),
1100                                                           instance));
1101 }
1102
1103 void PPB_Instance_Proxy::OnHostMsgLockMouse(PP_Instance instance) {
1104   // Need to be careful to always issue the callback.
1105   pp::CompletionCallback cb = callback_factory_.NewCallback(
1106       &PPB_Instance_Proxy::MouseLockCompleteInHost, instance);
1107
1108   EnterInstanceNoLock enter(instance, cb.pp_completion_callback());
1109   if (enter.succeeded())
1110     enter.SetResult(enter.functions()->LockMouse(instance, enter.callback()));
1111 }
1112
1113 void PPB_Instance_Proxy::OnHostMsgUnlockMouse(PP_Instance instance) {
1114   EnterInstanceNoLock enter(instance);
1115   if (enter.succeeded())
1116     enter.functions()->UnlockMouse(instance);
1117 }
1118
1119 void PPB_Instance_Proxy::OnHostMsgGetDocumentURL(
1120     PP_Instance instance,
1121     PP_URLComponents_Dev* components,
1122     SerializedVarReturnValue result) {
1123   if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
1124     return;
1125   EnterInstanceNoLock enter(instance);
1126   if (enter.succeeded()) {
1127     PP_Var document_url = enter.functions()->GetDocumentURL(instance,
1128                                                             components);
1129     result.Return(dispatcher(), document_url);
1130   }
1131 }
1132
1133 void PPB_Instance_Proxy::OnHostMsgResolveRelativeToDocument(
1134     PP_Instance instance,
1135     SerializedVarReceiveInput relative,
1136     SerializedVarReturnValue result) {
1137   if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
1138     return;
1139   EnterInstanceNoLock enter(instance);
1140   if (enter.succeeded()) {
1141     result.Return(dispatcher(),
1142                   enter.functions()->ResolveRelativeToDocument(
1143                       instance, relative.Get(dispatcher()), NULL));
1144   }
1145 }
1146
1147 void PPB_Instance_Proxy::OnHostMsgDocumentCanRequest(
1148     PP_Instance instance,
1149     SerializedVarReceiveInput url,
1150     PP_Bool* result) {
1151   if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
1152     return;
1153   EnterInstanceNoLock enter(instance);
1154   if (enter.succeeded()) {
1155     *result = enter.functions()->DocumentCanRequest(instance,
1156                                                     url.Get(dispatcher()));
1157   }
1158 }
1159
1160 void PPB_Instance_Proxy::OnHostMsgDocumentCanAccessDocument(PP_Instance active,
1161                                                             PP_Instance target,
1162                                                             PP_Bool* result) {
1163   if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
1164     return;
1165   EnterInstanceNoLock enter(active);
1166   if (enter.succeeded())
1167     *result = enter.functions()->DocumentCanAccessDocument(active, target);
1168 }
1169
1170 void PPB_Instance_Proxy::OnHostMsgGetPluginInstanceURL(
1171     PP_Instance instance,
1172     SerializedVarReturnValue result) {
1173   if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
1174     return;
1175   EnterInstanceNoLock enter(instance);
1176   if (enter.succeeded()) {
1177     result.Return(dispatcher(),
1178                   enter.functions()->GetPluginInstanceURL(instance, NULL));
1179   }
1180 }
1181
1182 void PPB_Instance_Proxy::OnHostMsgGetPluginReferrerURL(
1183     PP_Instance instance,
1184     SerializedVarReturnValue result) {
1185   if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
1186     return;
1187   EnterInstanceNoLock enter(instance);
1188   if (enter.succeeded()) {
1189     result.Return(dispatcher(),
1190                   enter.functions()->GetPluginReferrerURL(instance, NULL));
1191   }
1192 }
1193
1194 void PPB_Instance_Proxy::OnHostMsgPromiseResolved(PP_Instance instance,
1195                                                   uint32_t promise_id) {
1196   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1197     return;
1198   EnterInstanceNoLock enter(instance);
1199   if (enter.succeeded()) {
1200     enter.functions()->PromiseResolved(instance, promise_id);
1201   }
1202 }
1203
1204 void PPB_Instance_Proxy::OnHostMsgPromiseResolvedWithSession(
1205     PP_Instance instance,
1206     uint32_t promise_id,
1207     SerializedVarReceiveInput session_id) {
1208   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1209     return;
1210   EnterInstanceNoLock enter(instance);
1211   if (enter.succeeded()) {
1212     enter.functions()->PromiseResolvedWithSession(instance, promise_id,
1213                                                   session_id.Get(dispatcher()));
1214   }
1215 }
1216
1217 void PPB_Instance_Proxy::OnHostMsgPromiseRejected(
1218     PP_Instance instance,
1219     uint32_t promise_id,
1220     PP_CdmExceptionCode exception_code,
1221     uint32_t system_code,
1222     SerializedVarReceiveInput error_description) {
1223   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1224     return;
1225   EnterInstanceNoLock enter(instance);
1226   if (enter.succeeded()) {
1227     enter.functions()->PromiseRejected(instance,
1228                                        promise_id,
1229                                        exception_code,
1230                                        system_code,
1231                                        error_description.Get(dispatcher()));
1232   }
1233 }
1234
1235 void PPB_Instance_Proxy::OnHostMsgSessionMessage(
1236     PP_Instance instance,
1237     SerializedVarReceiveInput session_id,
1238     PP_CdmMessageType message_type,
1239     SerializedVarReceiveInput message,
1240     SerializedVarReceiveInput legacy_destination_url) {
1241   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1242     return;
1243   EnterInstanceNoLock enter(instance);
1244   if (enter.succeeded()) {
1245     enter.functions()->SessionMessage(instance, session_id.Get(dispatcher()),
1246                                       message_type, message.Get(dispatcher()),
1247                                       legacy_destination_url.Get(dispatcher()));
1248   }
1249 }
1250
1251 void PPB_Instance_Proxy::OnHostMsgSessionKeysChange(
1252     PP_Instance instance,
1253     const std::string& session_id,
1254     PP_Bool has_additional_usable_key,
1255     const std::vector<PP_KeyInformation>& key_information) {
1256   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1257     return;
1258
1259   if (key_information.size() > media::limits::kMaxKeyIds) {
1260     NOTREACHED();
1261     return;
1262   }
1263
1264   EnterInstanceNoLock enter(instance);
1265   if (enter.succeeded()) {
1266     ScopedPPVar session_id_var(ScopedPPVar::PassRef(),
1267                                StringVar::StringToPPVar(session_id));
1268     enter.functions()->SessionKeysChange(
1269         instance, session_id_var.get(), has_additional_usable_key,
1270         base::checked_cast<uint32_t>(key_information.size()),
1271         vector_as_array(&key_information));
1272   }
1273 }
1274
1275 void PPB_Instance_Proxy::OnHostMsgSessionExpirationChange(
1276     PP_Instance instance,
1277     const std::string& session_id,
1278     PP_Time new_expiry_time) {
1279   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1280     return;
1281   EnterInstanceNoLock enter(instance);
1282   if (enter.succeeded()) {
1283     ScopedPPVar session_id_var(ScopedPPVar::PassRef(),
1284                                StringVar::StringToPPVar(session_id));
1285     enter.functions()->SessionExpirationChange(instance, session_id_var.get(),
1286                                                new_expiry_time);
1287   }
1288 }
1289
1290 void PPB_Instance_Proxy::OnHostMsgSessionClosed(
1291     PP_Instance instance,
1292     SerializedVarReceiveInput session_id) {
1293   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1294     return;
1295   EnterInstanceNoLock enter(instance);
1296   if (enter.succeeded()) {
1297     enter.functions()->SessionClosed(instance, session_id.Get(dispatcher()));
1298   }
1299 }
1300
1301 void PPB_Instance_Proxy::OnHostMsgLegacySessionError(
1302     PP_Instance instance,
1303     SerializedVarReceiveInput session_id,
1304     PP_CdmExceptionCode exception_code,
1305     uint32_t system_code,
1306     SerializedVarReceiveInput error_description) {
1307   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1308     return;
1309   EnterInstanceNoLock enter(instance);
1310   if (enter.succeeded()) {
1311     enter.functions()->LegacySessionError(
1312         instance, session_id.Get(dispatcher()), exception_code, system_code,
1313         error_description.Get(dispatcher()));
1314   }
1315 }
1316
1317 void PPB_Instance_Proxy::OnHostMsgDeliverBlock(
1318     PP_Instance instance,
1319     PP_Resource decrypted_block,
1320     const std::string& serialized_block_info) {
1321   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1322     return;
1323   PP_DecryptedBlockInfo block_info;
1324   if (!DeserializeBlockInfo(serialized_block_info, &block_info))
1325     return;
1326
1327   EnterInstanceNoLock enter(instance);
1328   if (enter.succeeded())
1329     enter.functions()->DeliverBlock(instance, decrypted_block, &block_info);
1330 }
1331
1332 void PPB_Instance_Proxy::OnHostMsgDecoderInitializeDone(
1333     PP_Instance instance,
1334     PP_DecryptorStreamType decoder_type,
1335     uint32_t request_id,
1336     PP_Bool success) {
1337   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1338     return;
1339   EnterInstanceNoLock enter(instance);
1340   if (enter.succeeded()) {
1341     enter.functions()->DecoderInitializeDone(instance,
1342                                              decoder_type,
1343                                              request_id,
1344                                              success);
1345   }
1346 }
1347
1348 void PPB_Instance_Proxy::OnHostMsgDecoderDeinitializeDone(
1349     PP_Instance instance,
1350     PP_DecryptorStreamType decoder_type,
1351     uint32_t request_id) {
1352   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1353     return;
1354   EnterInstanceNoLock enter(instance);
1355   if (enter.succeeded())
1356     enter.functions()->DecoderDeinitializeDone(instance,
1357                                                decoder_type,
1358                                                request_id);
1359 }
1360
1361 void PPB_Instance_Proxy::OnHostMsgDecoderResetDone(
1362     PP_Instance instance,
1363     PP_DecryptorStreamType decoder_type,
1364     uint32_t request_id) {
1365   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1366     return;
1367   EnterInstanceNoLock enter(instance);
1368   if (enter.succeeded())
1369     enter.functions()->DecoderResetDone(instance, decoder_type, request_id);
1370 }
1371
1372 void PPB_Instance_Proxy::OnHostMsgDeliverFrame(
1373     PP_Instance instance,
1374     PP_Resource decrypted_frame,
1375     const std::string& serialized_frame_info) {
1376   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1377     return;
1378   PP_DecryptedFrameInfo frame_info;
1379   if (!DeserializeBlockInfo(serialized_frame_info, &frame_info))
1380     return;
1381
1382   EnterInstanceNoLock enter(instance);
1383   if (enter.succeeded())
1384     enter.functions()->DeliverFrame(instance, decrypted_frame, &frame_info);
1385 }
1386
1387 void PPB_Instance_Proxy::OnHostMsgDeliverSamples(
1388     PP_Instance instance,
1389     PP_Resource audio_frames,
1390     const std::string& serialized_sample_info) {
1391   if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
1392     return;
1393   PP_DecryptedSampleInfo sample_info;
1394   if (!DeserializeBlockInfo(serialized_sample_info, &sample_info))
1395     return;
1396
1397   EnterInstanceNoLock enter(instance);
1398   if (enter.succeeded())
1399     enter.functions()->DeliverSamples(instance, audio_frames, &sample_info);
1400 }
1401
1402 void PPB_Instance_Proxy::OnHostMsgSetCursor(
1403     PP_Instance instance,
1404     int32_t type,
1405     const ppapi::HostResource& custom_image,
1406     const PP_Point& hot_spot) {
1407   // This API serves PPB_CursorControl_Dev and PPB_MouseCursor, so is public.
1408   EnterInstanceNoLock enter(instance);
1409   if (enter.succeeded()) {
1410     enter.functions()->SetCursor(
1411         instance, static_cast<PP_MouseCursor_Type>(type),
1412         custom_image.host_resource(), &hot_spot);
1413   }
1414 }
1415
1416 void PPB_Instance_Proxy::OnHostMsgSetTextInputType(PP_Instance instance,
1417                                                    PP_TextInput_Type type) {
1418   EnterInstanceNoLock enter(instance);
1419   if (enter.succeeded())
1420     enter.functions()->SetTextInputType(instance, type);
1421 }
1422
1423 void PPB_Instance_Proxy::OnHostMsgUpdateCaretPosition(
1424     PP_Instance instance,
1425     const PP_Rect& caret,
1426     const PP_Rect& bounding_box) {
1427   EnterInstanceNoLock enter(instance);
1428   if (enter.succeeded())
1429     enter.functions()->UpdateCaretPosition(instance, caret, bounding_box);
1430 }
1431
1432 void PPB_Instance_Proxy::OnHostMsgCancelCompositionText(PP_Instance instance) {
1433   EnterInstanceNoLock enter(instance);
1434   if (enter.succeeded())
1435     enter.functions()->CancelCompositionText(instance);
1436 }
1437
1438 void PPB_Instance_Proxy::OnHostMsgUpdateSurroundingText(
1439     PP_Instance instance,
1440     const std::string& text,
1441     uint32_t caret,
1442     uint32_t anchor) {
1443   EnterInstanceNoLock enter(instance);
1444   if (enter.succeeded()) {
1445     enter.functions()->UpdateSurroundingText(instance, text.c_str(), caret,
1446                                              anchor);
1447   }
1448 }
1449 #endif  // !defined(OS_NACL)
1450
1451 void PPB_Instance_Proxy::OnPluginMsgMouseLockComplete(PP_Instance instance,
1452                                                       int32_t result) {
1453   if (!dispatcher()->IsPlugin())
1454     return;
1455
1456   // Save the mouse callback on the instance data.
1457   InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
1458       GetInstanceData(instance);
1459   if (!data)
1460     return;  // Instance was probably deleted.
1461   if (!TrackedCallback::IsPending(data->mouse_lock_callback)) {
1462     NOTREACHED();
1463     return;
1464   }
1465   data->mouse_lock_callback->Run(result);
1466 }
1467
1468 #if !defined(OS_NACL)
1469 void PPB_Instance_Proxy::MouseLockCompleteInHost(int32_t result,
1470                                                  PP_Instance instance) {
1471   dispatcher()->Send(new PpapiMsg_PPBInstance_MouseLockComplete(
1472       API_ID_PPB_INSTANCE, instance, result));
1473 }
1474 #endif  // !defined(OS_NACL)
1475
1476 void PPB_Instance_Proxy::CancelAnyPendingRequestSurroundingText(
1477     PP_Instance instance) {
1478   InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
1479       GetInstanceData(instance);
1480   if (!data)
1481     return;  // Instance was probably deleted.
1482   data->should_do_request_surrounding_text = false;
1483 }
1484
1485 }  // namespace proxy
1486 }  // namespace ppapi