chrome_frame/chrome_frame_activex.cc

   1 // Copyright (c) 2011 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 "chrome_frame/chrome_frame_activex.h"
   6
   7 #include <wininet.h>
   8
   9 #include <algorithm>
  10 #include <map>
  11
  12 #include "base/basictypes.h"
  13 #include "base/command_line.h"
  14 #include "base/debug/trace_event.h"
  15 #include "base/file_util.h"
  16 #include "base/logging.h"
  17 #include "base/memory/singleton.h"
  18 #include "base/path_service.h"
  19 #include "base/process_util.h"
  20 #include "base/string_split.h"
  21 #include "base/string_util.h"
  22 #include "base/stringprintf.h"
  23 #include "base/utf_string_conversions.h"
  24 #include "base/win/scoped_bstr.h"
  25 #include "base/win/scoped_variant.h"
  26 #include "chrome/common/automation_messages.h"
  27 #include "chrome/common/chrome_constants.h"
  28 #include "chrome/common/chrome_switches.h"
  29 #include "chrome/test/automation/tab_proxy.h"
  30 #include "chrome_frame/utils.h"
  31 #include "googleurl/src/gurl.h"
  32
  33 namespace {
  34
  35 // Class used to maintain a mapping from top-level windows to ChromeFrameActivex
  36 // instances.
  37 class TopLevelWindowMapping {
  38  public:
  39   typedef std::vector<HWND> WindowList;
  40
  41   static TopLevelWindowMapping* GetInstance() {
  42     return Singleton<TopLevelWindowMapping>::get();
  43   }
  44
  45   // Add |cf_window| to the set of windows registered under |top_window|.
  46   void AddMapping(HWND top_window, HWND cf_window) {
  47     top_window_map_lock_.Lock();
  48     top_window_map_[top_window].push_back(cf_window);
  49     top_window_map_lock_.Unlock();
  50   }
  51
  52   // Return the set of Chrome-Frame instances under |window|.
  53   WindowList GetInstances(HWND window) {
  54     top_window_map_lock_.Lock();
  55     WindowList list = top_window_map_[window];
  56     top_window_map_lock_.Unlock();
  57     return list;
  58   }
  59
  60  private:
  61   // Constructor is private as this class it to be used as a singleton.
  62   // See static method instance().
  63   TopLevelWindowMapping() {}
  64
  65   friend struct DefaultSingletonTraits<TopLevelWindowMapping>;
  66
  67   typedef std::map<HWND, WindowList> TopWindowMap;
  68   TopWindowMap top_window_map_;
  69
  70   CComAutoCriticalSection top_window_map_lock_;
  71
  72   DISALLOW_COPY_AND_ASSIGN(TopLevelWindowMapping);
  73 };
  74
  75 // Message pump hook function that monitors for WM_MOVE and WM_MOVING
  76 // messages on a top-level window, and passes notification to the appropriate
  77 // Chrome-Frame instances.
  78 LRESULT CALLBACK TopWindowProc(int code, WPARAM wparam, LPARAM lparam) {
  79   CWPSTRUCT *info = reinterpret_cast<CWPSTRUCT*>(lparam);
  80   const UINT &message = info->message;
  81   const HWND &message_hwnd = info->hwnd;
  82
  83   switch (message) {
  84     case WM_MOVE:
  85     case WM_MOVING: {
  86       TopLevelWindowMapping::WindowList cf_instances =
  87           TopLevelWindowMapping::GetInstance()->GetInstances(message_hwnd);
  88       TopLevelWindowMapping::WindowList::iterator
  89           iter(cf_instances.begin()), end(cf_instances.end());
  90       for (;iter != end; ++iter) {
  91         PostMessage(*iter, WM_HOST_MOVED_NOTIFICATION, NULL, NULL);
  92       }
  93       break;
  94     }
  95     default:
  96       break;
  97   }
  98
  99   return CallNextHookEx(0, code, wparam, lparam);
 100 }
 101
 102 HHOOK InstallLocalWindowHook(HWND window) {
 103   if (!window)
 104     return NULL;
 105
 106   DWORD proc_thread = ::GetWindowThreadProcessId(window, NULL);
 107   if (!proc_thread)
 108     return NULL;
 109
 110   // Note that this hook is installed as a LOCAL hook.
 111   return  ::SetWindowsHookEx(WH_CALLWNDPROC,
 112                              TopWindowProc,
 113                              NULL,
 114                              proc_thread);
 115 }
 116
 117 }  // unnamed namespace
 118
 119 namespace chrome_frame {
 120 std::string ActiveXCreateUrl(const GURL& parsed_url,
 121                              const AttachExternalTabParams& params) {
 122   return base::StringPrintf(
 123       "%hs?attach_external_tab&%I64u&%d&%d&%d&%d&%d&%hs",
 124       parsed_url.GetOrigin().spec().c_str(),
 125       params.cookie,
 126       params.disposition,
 127       params.dimensions.x(),
 128       params.dimensions.y(),
 129       params.dimensions.width(),
 130       params.dimensions.height(),
 131       params.profile_name.c_str());
 132 }
 133
 134 int GetDisposition(const AttachExternalTabParams& params) {
 135   return params.disposition;
 136 }
 137
 138 void GetMiniContextMenuData(UINT cmd,
 139                             const MiniContextMenuParams& params,
 140                             GURL* referrer,
 141                             GURL* url) {
 142   *referrer = params.frame_url.is_empty() ? params.page_url : params.frame_url;
 143   *url = (cmd == IDS_CONTENT_CONTEXT_SAVELINKAS ?
 144       params.link_url : params.src_url);
 145 }
 146
 147 }  // namespace chrome_frame
 148
 149 ChromeFrameActivex::ChromeFrameActivex()
 150     : chrome_wndproc_hook_(NULL) {
 151   TRACE_EVENT_BEGIN_ETW("chromeframe.createactivex", this, "");
 152 }
 153
 154 HRESULT ChromeFrameActivex::FinalConstruct() {
 155   HRESULT hr = Base::FinalConstruct();
 156   if (FAILED(hr))
 157     return hr;
 158
 159   // No need to call FireOnChanged at this point since nobody will be listening.
 160   ready_state_ = READYSTATE_LOADING;
 161   return S_OK;
 162 }
 163
 164 ChromeFrameActivex::~ChromeFrameActivex() {
 165   // We expect these to be released during a call to SetClientSite(NULL).
 166   DCHECK_EQ(0u, onmessage_.size());
 167   DCHECK_EQ(0u, onloaderror_.size());
 168   DCHECK_EQ(0u, onload_.size());
 169   DCHECK_EQ(0u, onreadystatechanged_.size());
 170   DCHECK_EQ(0u, onextensionready_.size());
 171
 172   if (chrome_wndproc_hook_) {
 173     BOOL unhook_success = ::UnhookWindowsHookEx(chrome_wndproc_hook_);
 174     DCHECK(unhook_success);
 175   }
 176
 177   // ChromeFramePlugin::Uninitialize()
 178   Base::Uninitialize();
 179
 180   TRACE_EVENT_END_ETW("chromeframe.createactivex", this, "");
 181 }
 182
 183 LRESULT ChromeFrameActivex::OnCreate(UINT message, WPARAM wparam, LPARAM lparam,
 184                                      BOOL& handled) {
 185   Base::OnCreate(message, wparam, lparam, handled);
 186   // Install the notification hook on the top-level window, so that we can
 187   // be notified on move events.  Note that the return value is not checked.
 188   // This hook is installed here, as opposed to during IOleObject_SetClientSite
 189   // because m_hWnd has not yet been assigned during the SetSite call.
 190   InstallTopLevelHook(m_spClientSite);
 191   return 0;
 192 }
 193
 194 LRESULT ChromeFrameActivex::OnHostMoved(UINT message, WPARAM wparam,
 195                                         LPARAM lparam, BOOL& handled) {
 196   Base::OnHostMoved();
 197   return 0;
 198 }
 199
 200 HRESULT ChromeFrameActivex::GetContainingDocument(IHTMLDocument2** doc) {
 201   base::win::ScopedComPtr<IOleContainer> container;
 202   HRESULT hr = m_spClientSite->GetContainer(container.Receive());
 203   if (container)
 204     hr = container.QueryInterface(doc);
 205   return hr;
 206 }
 207
 208 HRESULT ChromeFrameActivex::GetDocumentWindow(IHTMLWindow2** window) {
 209   base::win::ScopedComPtr<IHTMLDocument2> document;
 210   HRESULT hr = GetContainingDocument(document.Receive());
 211   if (document)
 212     hr = document->get_parentWindow(window);
 213   return hr;
 214 }
 215
 216 void ChromeFrameActivex::OnLoad(const GURL& gurl) {
 217   base::win::ScopedComPtr<IDispatch> event;
 218   std::string url = gurl.spec();
 219   if (SUCCEEDED(CreateDomEvent("event", url, "", event.Receive())))
 220     Fire_onload(event);
 221
 222   FireEvent(onload_, url);
 223   Base::OnLoad(gurl);
 224 }
 225
 226 void ChromeFrameActivex::OnLoadFailed(int error_code, const std::string& url) {
 227   base::win::ScopedComPtr<IDispatch> event;
 228   if (SUCCEEDED(CreateDomEvent("event", url, "", event.Receive())))
 229     Fire_onloaderror(event);
 230
 231   FireEvent(onloaderror_, url);
 232   Base::OnLoadFailed(error_code, url);
 233 }
 234
 235 void ChromeFrameActivex::OnMessageFromChromeFrame(const std::string& message,
 236                                                   const std::string& origin,
 237                                                   const std::string& target) {
 238   DVLOG(1) << __FUNCTION__;
 239
 240   if (target.compare("*") != 0) {
 241     bool drop = true;
 242
 243     if (is_privileged()) {
 244       // Forward messages if the control is in privileged mode.
 245       base::win::ScopedComPtr<IDispatch> message_event;
 246       if (SUCCEEDED(CreateDomEvent("message", message, origin,
 247                                    message_event.Receive()))) {
 248         base::win::ScopedBstr target_bstr(UTF8ToWide(target).c_str());
 249         Fire_onprivatemessage(message_event, target_bstr);
 250
 251         FireEvent(onprivatemessage_, message_event, target_bstr);
 252       }
 253     } else {
 254       if (HaveSameOrigin(target, document_url_)) {
 255         drop = false;
 256       } else {
 257         DLOG(WARNING) << "Dropping posted message since target doesn't match "
 258             "the current document's origin. target=" << target;
 259       }
 260     }
 261
 262     if (drop)
 263       return;
 264   }
 265
 266   base::win::ScopedComPtr<IDispatch> message_event;
 267   if (SUCCEEDED(CreateDomEvent("message", message, origin,
 268                                message_event.Receive()))) {
 269     Fire_onmessage(message_event);
 270
 271     FireEvent(onmessage_, message_event);
 272
 273     base::win::ScopedVariant event_var;
 274     event_var.Set(static_cast<IDispatch*>(message_event));
 275     InvokeScriptFunction(onmessage_handler_, event_var.AsInput());
 276   }
 277 }
 278
 279 bool ChromeFrameActivex::ShouldShowVersionMismatchDialog(
 280     bool is_privileged,
 281     IOleClientSite* client_site) {
 282   if (!is_privileged) {
 283     return true;
 284   }
 285
 286   if (client_site) {
 287     base::win::ScopedComPtr<IChromeFramePrivileged> service;
 288     HRESULT hr = DoQueryService(SID_ChromeFramePrivileged,
 289                                 client_site,
 290                                 service.Receive());
 291     if (SUCCEEDED(hr) && service) {
 292       return (S_FALSE != service->ShouldShowVersionMismatchDialog());
 293     }
 294   }
 295
 296   NOTREACHED();
 297   return true;
 298 }
 299
 300 void ChromeFrameActivex::OnAutomationServerLaunchFailed(
 301     AutomationLaunchResult reason, const std::string& server_version) {
 302   Base::OnAutomationServerLaunchFailed(reason, server_version);
 303
 304   if (reason == AUTOMATION_VERSION_MISMATCH &&
 305       ShouldShowVersionMismatchDialog(is_privileged(), m_spClientSite)) {
 306     UMA_HISTOGRAM_COUNTS("ChromeFrame.VersionMismatchDisplayed", 1);
 307     DisplayVersionMismatchWarning(m_hWnd, server_version);
 308   }
 309 }
 310
 311 void ChromeFrameActivex::OnChannelError() {
 312   Fire_onchannelerror();
 313 }
 314
 315 HRESULT ChromeFrameActivex::OnDraw(ATL_DRAWINFO& draw_info) {  // NOLINT
 316   HRESULT hr = S_OK;
 317   int dc_type = ::GetObjectType(draw_info.hicTargetDev);
 318   if (dc_type == OBJ_ENHMETADC) {
 319     RECT print_bounds = {0};
 320     print_bounds.left = draw_info.prcBounds->left;
 321     print_bounds.right = draw_info.prcBounds->right;
 322     print_bounds.top = draw_info.prcBounds->top;
 323     print_bounds.bottom = draw_info.prcBounds->bottom;
 324
 325     automation_client_->Print(draw_info.hdcDraw, print_bounds);
 326   } else {
 327     hr = Base::OnDraw(draw_info);
 328   }
 329
 330   return hr;
 331 }
 332
 333 STDMETHODIMP ChromeFrameActivex::Load(IPropertyBag* bag, IErrorLog* error_log) {
 334   DCHECK(bag);
 335
 336   const wchar_t* event_props[] = {
 337     (L"onload"),
 338     (L"onloaderror"),
 339     (L"onmessage"),
 340     (L"onreadystatechanged"),
 341   };
 342
 343   base::win::ScopedComPtr<IHTMLObjectElement> obj_element;
 344   GetObjectElement(obj_element.Receive());
 345
 346   base::win::ScopedBstr object_id;
 347   GetObjectScriptId(obj_element, object_id.Receive());
 348
 349   base::win::ScopedComPtr<IHTMLElement2> element;
 350   element.QueryFrom(obj_element);
 351   HRESULT hr = S_OK;
 352
 353   for (int i = 0; SUCCEEDED(hr) && i < arraysize(event_props); ++i) {
 354     base::win::ScopedBstr prop(event_props[i]);
 355     base::win::ScopedVariant value;
 356     if (SUCCEEDED(bag->Read(prop, value.Receive(), error_log))) {
 357       if (value.type() != VT_BSTR ||
 358           FAILED(hr = CreateScriptBlockForEvent(element, object_id,
 359                                                 V_BSTR(&value), prop))) {
 360         DLOG(ERROR) << "Failed to create script block for " << prop
 361                     << base::StringPrintf(L"hr=0x%08X, vt=%i", hr,
 362                                          value.type());
 363       } else {
 364         DVLOG(1) << "script block created for event " << prop
 365                  << base::StringPrintf(" (0x%08X)", hr) << " connections: " <<
 366             ProxyDIChromeFrameEvents<ChromeFrameActivex>::m_vec.GetSize();
 367       }
 368     } else {
 369       DVLOG(1) << "event property " << prop << " not in property bag";
 370     }
 371   }
 372
 373   base::win::ScopedVariant src;
 374   if (SUCCEEDED(bag->Read(base::win::ScopedBstr(L"src"), src.Receive(),
 375                           error_log))) {
 376     if (src.type() == VT_BSTR) {
 377       hr = put_src(V_BSTR(&src));
 378       DCHECK(hr != E_UNEXPECTED);
 379     }
 380   }
 381
 382   base::win::ScopedVariant use_chrome_network;
 383   if (SUCCEEDED(bag->Read(base::win::ScopedBstr(L"useChromeNetwork"),
 384                           use_chrome_network.Receive(), error_log))) {
 385     VariantChangeType(use_chrome_network.AsInput(),
 386                       use_chrome_network.AsInput(),
 387                       0, VT_BOOL);
 388     if (use_chrome_network.type() == VT_BOOL) {
 389       hr = put_useChromeNetwork(V_BOOL(&use_chrome_network));
 390       DCHECK(hr != E_UNEXPECTED);
 391     }
 392   }
 393
 394   DLOG_IF(ERROR, FAILED(hr))
 395       << base::StringPrintf("Failed to load property bag: 0x%08X", hr);
 396
 397   return hr;
 398 }
 399
 400 const wchar_t g_activex_insecure_content_error[] = {
 401     L"data:text/html,<html><body><b>ChromeFrame Security Error<br><br>"
 402     L"Cannot navigate to HTTP url when document URL is HTTPS</body></html>"};
 403
 404 STDMETHODIMP ChromeFrameActivex::put_src(BSTR src) {
 405   GURL document_url(GetDocumentUrl());
 406   if (document_url.SchemeIsSecure()) {
 407     GURL source_url(src);
 408     if (!source_url.SchemeIsSecure()) {
 409       Base::put_src(base::win::ScopedBstr(g_activex_insecure_content_error));
 410       return E_ACCESSDENIED;
 411     }
 412   }
 413   return Base::put_src(src);
 414 }
 415
 416 HRESULT ChromeFrameActivex::IOleObject_SetClientSite(
 417     IOleClientSite* client_site) {
 418   HRESULT hr = Base::IOleObject_SetClientSite(client_site);
 419   if (FAILED(hr) || !client_site) {
 420     EventHandlers* handlers[] = {
 421       &onmessage_,
 422       &onloaderror_,
 423       &onload_,
 424       &onreadystatechanged_,
 425       &onextensionready_,
 426     };
 427
 428     for (int i = 0; i < arraysize(handlers); ++i)
 429       handlers[i]->clear();
 430
 431     // Drop privileged mode on uninitialization.
 432     set_is_privileged(false);
 433   } else {
 434     base::win::ScopedComPtr<IHTMLDocument2> document;
 435     GetContainingDocument(document.Receive());
 436     if (document) {
 437       base::win::ScopedBstr url;
 438       if (SUCCEEDED(document->get_URL(url.Receive())))
 439         WideToUTF8(url, url.Length(), &document_url_);
 440     }
 441
 442     // Probe to see whether the host implements the privileged service.
 443     base::win::ScopedComPtr<IChromeFramePrivileged> service;
 444     HRESULT service_hr = DoQueryService(SID_ChromeFramePrivileged,
 445                                         m_spClientSite,
 446                                         service.Receive());
 447     if (SUCCEEDED(service_hr) && service) {
 448       // Does the host want privileged mode?
 449       boolean wants_privileged = false;
 450       service_hr = service->GetWantsPrivileged(&wants_privileged);
 451
 452       if (SUCCEEDED(service_hr) && wants_privileged)
 453         set_is_privileged(true);
 454
 455       url_fetcher_->set_privileged_mode(is_privileged());
 456     }
 457
 458     std::wstring profile_name(GetHostProcessName(false));
 459     if (is_privileged()) {
 460       base::win::ScopedBstr profile_name_arg;
 461       service_hr = service->GetChromeProfileName(profile_name_arg.Receive());
 462       if (S_OK == service_hr && profile_name_arg)
 463         profile_name.assign(profile_name_arg, profile_name_arg.Length());
 464     }
 465
 466     std::string utf8_url;
 467     if (url_.Length()) {
 468       WideToUTF8(url_, url_.Length(), &utf8_url);
 469     }
 470
 471     InitializeAutomationSettings();
 472
 473     url_fetcher_->set_frame_busting(!is_privileged());
 474     automation_client_->SetUrlFetcher(url_fetcher_.get());
 475     if (!InitializeAutomation(profile_name, IsIEInPrivate(), true,
 476                               GURL(utf8_url), GURL(), false)) {
 477       DLOG(ERROR) << "Failed to navigate to url:" << utf8_url;
 478       return E_FAIL;
 479     }
 480
 481     // Log a metric that Chrome Frame is being used in Widget mode
 482     UMA_LAUNCH_TYPE_COUNT(RENDERER_TYPE_CHROME_WIDGET);
 483   }
 484
 485   return hr;
 486 }
 487
 488 HRESULT ChromeFrameActivex::GetObjectScriptId(IHTMLObjectElement* object_elem,
 489                                               BSTR* id) {
 490   DCHECK(object_elem != NULL);
 491   DCHECK(id != NULL);
 492
 493   HRESULT hr = E_FAIL;
 494   if (object_elem) {
 495     base::win::ScopedComPtr<IHTMLElement> elem;
 496     hr = elem.QueryFrom(object_elem);
 497     if (elem) {
 498       hr = elem->get_id(id);
 499     }
 500   }
 501
 502   return hr;
 503 }
 504
 505 HRESULT ChromeFrameActivex::GetObjectElement(IHTMLObjectElement** element) {
 506   DCHECK(m_spClientSite);
 507   if (!m_spClientSite)
 508     return E_UNEXPECTED;
 509
 510   base::win::ScopedComPtr<IOleControlSite> site;
 511   HRESULT hr = site.QueryFrom(m_spClientSite);
 512   if (site) {
 513     base::win::ScopedComPtr<IDispatch> disp;
 514     hr = site->GetExtendedControl(disp.Receive());
 515     if (disp) {
 516       hr = disp.QueryInterface(element);
 517     } else {
 518       DCHECK(FAILED(hr));
 519     }
 520   }
 521
 522   return hr;
 523 }
 524
 525 HRESULT ChromeFrameActivex::CreateScriptBlockForEvent(
 526     IHTMLElement2* insert_after, BSTR instance_id, BSTR script,
 527     BSTR event_name) {
 528   DCHECK(insert_after);
 529   DCHECK_GT(::SysStringLen(event_name), 0UL);  // should always have this
 530
 531   // This might be 0 if not specified in the HTML document.
 532   if (!::SysStringLen(instance_id)) {
 533     // TODO(tommi): Should we give ourselves an ID if this happens?
 534     NOTREACHED() << "Need to handle this";
 535     return E_INVALIDARG;
 536   }
 537
 538   base::win::ScopedComPtr<IHTMLDocument2> document;
 539   HRESULT hr = GetContainingDocument(document.Receive());
 540   if (SUCCEEDED(hr)) {
 541     base::win::ScopedComPtr<IHTMLElement> element, new_element;
 542     document->createElement(base::win::ScopedBstr(L"script"),
 543                             element.Receive());
 544     if (element) {
 545       base::win::ScopedComPtr<IHTMLScriptElement> script_element;
 546       if (SUCCEEDED(hr = script_element.QueryFrom(element))) {
 547         script_element->put_htmlFor(instance_id);
 548         script_element->put_event(event_name);
 549         script_element->put_text(script);
 550
 551         hr = insert_after->insertAdjacentElement(
 552             base::win::ScopedBstr(L"afterEnd"),
 553             element,
 554             new_element.Receive());
 555       }
 556     }
 557   }
 558
 559   return hr;
 560 }
 561
 562 void ChromeFrameActivex::FireEvent(const EventHandlers& handlers,
 563                                    const std::string& arg) {
 564   if (handlers.size()) {
 565     base::win::ScopedComPtr<IDispatch> event;
 566     if (SUCCEEDED(CreateDomEvent("event", arg, "", event.Receive()))) {
 567       FireEvent(handlers, event);
 568     }
 569   }
 570 }
 571
 572 void ChromeFrameActivex::FireEvent(const EventHandlers& handlers,
 573                                    IDispatch* event) {
 574   DCHECK(event != NULL);
 575   VARIANT arg = { VT_DISPATCH };
 576   arg.pdispVal = event;
 577   DISPPARAMS params = { &arg, NULL, 1, 0 };
 578   for (EventHandlers::const_iterator it = handlers.begin();
 579        it != handlers.end();
 580        ++it) {
 581     HRESULT hr = (*it)->Invoke(DISPID_VALUE, IID_NULL, LOCALE_USER_DEFAULT,
 582                                DISPATCH_METHOD, &params, NULL, NULL, NULL);
 583     // 0x80020101 == SCRIPT_E_REPORTED.
 584     // When the script we're invoking has an error, we get this error back.
 585     DLOG_IF(ERROR, FAILED(hr) && hr != 0x80020101)
 586         << base::StringPrintf(L"Failed to invoke script: 0x%08X", hr);
 587   }
 588 }
 589
 590 void ChromeFrameActivex::FireEvent(const EventHandlers& handlers,
 591                                    IDispatch* event, BSTR target) {
 592   DCHECK(event != NULL);
 593   // Arguments in reverse order to event handler function declaration,
 594   // because that's what DISPPARAMS requires.
 595   VARIANT args[2] = { { VT_BSTR }, { VT_DISPATCH }, };
 596   args[0].bstrVal = target;
 597   args[1].pdispVal = event;
 598   DISPPARAMS params = { args, NULL, arraysize(args), 0 };
 599   for (EventHandlers::const_iterator it = handlers.begin();
 600        it != handlers.end();
 601        ++it) {
 602     HRESULT hr = (*it)->Invoke(DISPID_VALUE, IID_NULL, LOCALE_USER_DEFAULT,
 603                                DISPATCH_METHOD, &params, NULL, NULL, NULL);
 604     // 0x80020101 == SCRIPT_E_REPORTED.
 605     // When the script we're invoking has an error, we get this error back.
 606     DLOG_IF(ERROR, FAILED(hr) && hr != 0x80020101)
 607         << base::StringPrintf(L"Failed to invoke script: 0x%08X", hr);
 608   }
 609 }
 610
 611 HRESULT ChromeFrameActivex::InstallTopLevelHook(IOleClientSite* client_site) {
 612   // Get the parent window of the site, and install our hook on the topmost
 613   // window of the parent.
 614   base::win::ScopedComPtr<IOleWindow> ole_window;
 615   HRESULT hr = ole_window.QueryFrom(client_site);
 616   if (FAILED(hr))
 617     return hr;
 618
 619   HWND parent_wnd;
 620   hr = ole_window->GetWindow(&parent_wnd);
 621   if (FAILED(hr))
 622     return hr;
 623
 624   HWND top_window = ::GetAncestor(parent_wnd, GA_ROOT);
 625   chrome_wndproc_hook_ = InstallLocalWindowHook(top_window);
 626   if (chrome_wndproc_hook_)
 627     TopLevelWindowMapping::GetInstance()->AddMapping(top_window, m_hWnd);
 628
 629   return chrome_wndproc_hook_ ? S_OK : E_FAIL;
 630 }
 631
 632 HRESULT ChromeFrameActivex::registerBhoIfNeeded() {
 633   if (!m_spUnkSite) {
 634     NOTREACHED() << "Invalid client site";
 635     return E_FAIL;
 636   }
 637
 638   if (NavigationManager::GetThreadInstance() != NULL) {
 639     DVLOG(1) << "BHO already loaded";
 640     return S_OK;
 641   }
 642
 643   base::win::ScopedComPtr<IWebBrowser2> web_browser2;
 644   HRESULT hr = DoQueryService(SID_SWebBrowserApp, m_spUnkSite,
 645                               web_browser2.Receive());
 646   if (FAILED(hr) || web_browser2.get() == NULL) {
 647     DLOG(WARNING) << "Failed to get IWebBrowser2 from client site. Error:"
 648                   << base::StringPrintf(" 0x%08X", hr);
 649     return hr;
 650   }
 651
 652   wchar_t bho_class_id_as_string[MAX_PATH] = {0};
 653   StringFromGUID2(CLSID_ChromeFrameBHO, bho_class_id_as_string,
 654                   arraysize(bho_class_id_as_string));
 655
 656   base::win::ScopedComPtr<IObjectWithSite> bho;
 657   hr = bho.CreateInstance(CLSID_ChromeFrameBHO, NULL, CLSCTX_INPROC_SERVER);
 658   if (FAILED(hr)) {
 659     NOTREACHED() << "Failed to register ChromeFrame BHO. Error:"
 660                  << base::StringPrintf(" 0x%08X", hr);
 661     return hr;
 662   }
 663
 664   hr = UrlMkSetSessionOption(URLMON_OPTION_USERAGENT_REFRESH, NULL, 0, 0);
 665   if (FAILED(hr)) {
 666     DLOG(ERROR) << "Failed to refresh user agent string from registry. "
 667                 << "UrlMkSetSessionOption returned "
 668                 << base::StringPrintf("0x%08x", hr);
 669     return hr;
 670   }
 671
 672   hr = bho->SetSite(web_browser2);
 673   if (FAILED(hr)) {
 674     NOTREACHED() << "ChromeFrame BHO SetSite failed. Error:"
 675                  << base::StringPrintf(" 0x%08X", hr);
 676     return hr;
 677   }
 678
 679   web_browser2->PutProperty(base::win::ScopedBstr(bho_class_id_as_string),
 680                             base::win::ScopedVariant(bho));
 681   return S_OK;
 682 }