cc/trees/layer_tree_host_unittest_context.cc

   1 // Copyright 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 "cc/trees/layer_tree_host.h"
   6
   7 #include "base/basictypes.h"
   8 #include "cc/layers/content_layer.h"
   9 #include "cc/layers/heads_up_display_layer.h"
  10 #include "cc/layers/io_surface_layer.h"
  11 #include "cc/layers/layer_impl.h"
  12 #include "cc/layers/picture_layer.h"
  13 #include "cc/layers/scrollbar_layer.h"
  14 #include "cc/layers/texture_layer.h"
  15 #include "cc/layers/video_layer.h"
  16 #include "cc/layers/video_layer_impl.h"
  17 #include "cc/test/fake_content_layer.h"
  18 #include "cc/test/fake_content_layer_client.h"
  19 #include "cc/test/fake_content_layer_impl.h"
  20 #include "cc/test/fake_context_provider.h"
  21 #include "cc/test/fake_delegated_renderer_layer.h"
  22 #include "cc/test/fake_delegated_renderer_layer_impl.h"
  23 #include "cc/test/fake_output_surface.h"
  24 #include "cc/test/fake_scrollbar_layer.h"
  25 #include "cc/test/fake_scrollbar_theme_painter.h"
  26 #include "cc/test/fake_video_frame_provider.h"
  27 #include "cc/test/fake_web_scrollbar.h"
  28 #include "cc/test/fake_web_scrollbar_theme_geometry.h"
  29 #include "cc/test/layer_tree_test.h"
  30 #include "cc/test/render_pass_test_common.h"
  31 #include "cc/test/test_web_graphics_context_3d.h"
  32 #include "cc/trees/layer_tree_host_impl.h"
  33 #include "cc/trees/layer_tree_impl.h"
  34 #include "cc/trees/single_thread_proxy.h"
  35 #include "gpu/GLES2/gl2extchromium.h"
  36 #include "media/base/media.h"
  37 #include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperations.h"
  38
  39 using media::VideoFrame;
  40 using WebKit::WebGraphicsContext3D;
  41
  42 namespace cc {
  43 namespace {
  44
  45 // These tests deal with losing the 3d graphics context.
  46 class LayerTreeHostContextTest : public LayerTreeTest {
  47  public:
  48   LayerTreeHostContextTest()
  49       : LayerTreeTest(),
  50         context3d_(NULL),
  51         times_to_fail_create_(0),
  52         times_to_fail_initialize_(0),
  53         times_to_lose_on_create_(0),
  54         times_to_lose_during_commit_(0),
  55         times_to_lose_during_draw_(0),
  56         times_to_fail_recreate_(0),
  57         times_to_fail_reinitialize_(0),
  58         times_to_lose_on_recreate_(0),
  59         times_to_fail_create_offscreen_(0),
  60         times_to_fail_recreate_offscreen_(0),
  61         times_to_expect_recreate_retried_(0),
  62         times_recreate_retried_(0),
  63         times_offscreen_created_(0),
  64         committed_at_least_once_(false) {
  65     media::InitializeMediaLibraryForTesting();
  66   }
  67
  68   void LoseContext() {
  69     context3d_->loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_ARB,
  70                                     GL_INNOCENT_CONTEXT_RESET_ARB);
  71     context3d_ = NULL;
  72   }
  73
  74   virtual scoped_ptr<TestWebGraphicsContext3D> CreateContext3d() {
  75     return TestWebGraphicsContext3D::Create();
  76   }
  77
  78   virtual scoped_ptr<OutputSurface> CreateOutputSurface() OVERRIDE {
  79     if (times_to_fail_create_) {
  80       --times_to_fail_create_;
  81       ExpectRecreateToRetry();
  82       return scoped_ptr<OutputSurface>();
  83     }
  84
  85     scoped_ptr<TestWebGraphicsContext3D> context3d = CreateContext3d();
  86     context3d_ = context3d.get();
  87
  88     if (times_to_fail_initialize_) {
  89       --times_to_fail_initialize_;
  90       // Make the context get lost during reinitialization.
  91       // The number of times MakeCurrent succeeds is not important, and
  92       // can be changed if needed to make this pass with future changes.
  93       context3d_->set_times_make_current_succeeds(2);
  94       ExpectRecreateToRetry();
  95     } else if (times_to_lose_on_create_) {
  96       --times_to_lose_on_create_;
  97       LoseContext();
  98       ExpectRecreateToRetry();
  99     }
 100
 101     return FakeOutputSurface::Create3d(
 102         context3d.PassAs<WebGraphicsContext3D>()).PassAs<OutputSurface>();
 103   }
 104
 105   scoped_ptr<TestWebGraphicsContext3D> CreateOffscreenContext3d() {
 106     if (!context3d_)
 107       return scoped_ptr<TestWebGraphicsContext3D>();
 108
 109     ++times_offscreen_created_;
 110
 111     if (times_to_fail_create_offscreen_) {
 112       --times_to_fail_create_offscreen_;
 113       ExpectRecreateToRetry();
 114       return scoped_ptr<TestWebGraphicsContext3D>();
 115     }
 116
 117     scoped_ptr<TestWebGraphicsContext3D> offscreen_context3d =
 118         TestWebGraphicsContext3D::Create().Pass();
 119     DCHECK(offscreen_context3d);
 120     context3d_->add_share_group_context(offscreen_context3d.get());
 121
 122     return offscreen_context3d.Pass();
 123   }
 124
 125   virtual scoped_refptr<cc::ContextProvider>
 126   OffscreenContextProviderForMainThread() OVERRIDE {
 127     DCHECK(!ImplThread());
 128
 129     if (!offscreen_contexts_main_thread_ ||
 130         offscreen_contexts_main_thread_->DestroyedOnMainThread()) {
 131       offscreen_contexts_main_thread_ = FakeContextProvider::Create(
 132           base::Bind(&LayerTreeHostContextTest::CreateOffscreenContext3d,
 133                      base::Unretained(this)));
 134       if (offscreen_contexts_main_thread_ &&
 135           !offscreen_contexts_main_thread_->BindToCurrentThread())
 136         offscreen_contexts_main_thread_ = NULL;
 137     }
 138     return offscreen_contexts_main_thread_;
 139   }
 140
 141   virtual scoped_refptr<cc::ContextProvider>
 142   OffscreenContextProviderForCompositorThread() OVERRIDE {
 143     DCHECK(ImplThread());
 144
 145     if (!offscreen_contexts_compositor_thread_ ||
 146         offscreen_contexts_compositor_thread_->DestroyedOnMainThread()) {
 147       offscreen_contexts_compositor_thread_ = FakeContextProvider::Create(
 148           base::Bind(&LayerTreeHostContextTest::CreateOffscreenContext3d,
 149                      base::Unretained(this)));
 150     }
 151     return offscreen_contexts_compositor_thread_;
 152   }
 153
 154   virtual bool PrepareToDrawOnThread(LayerTreeHostImpl* host_impl,
 155                                      LayerTreeHostImpl::FrameData* frame,
 156                                      bool result)
 157       OVERRIDE {
 158     bool expect_success = !frame->has_no_damage;
 159     EXPECT_EQ(expect_success, result);
 160     if (!times_to_lose_during_draw_)
 161       return result;
 162
 163     --times_to_lose_during_draw_;
 164     context3d_->set_times_make_current_succeeds(0);
 165
 166     times_to_fail_create_ = times_to_fail_recreate_;
 167     times_to_fail_recreate_ = 0;
 168     times_to_fail_initialize_ = times_to_fail_reinitialize_;
 169     times_to_fail_reinitialize_ = 0;
 170     times_to_lose_on_create_ = times_to_lose_on_recreate_;
 171     times_to_lose_on_recreate_ = 0;
 172     times_to_fail_create_offscreen_ = times_to_fail_recreate_offscreen_;
 173     times_to_fail_recreate_offscreen_ = 0;
 174
 175     return result;
 176   }
 177
 178   virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
 179     committed_at_least_once_ = true;
 180
 181     if (!times_to_lose_during_commit_)
 182       return;
 183     --times_to_lose_during_commit_;
 184     LoseContext();
 185
 186     times_to_fail_create_ = times_to_fail_recreate_;
 187     times_to_fail_recreate_ = 0;
 188     times_to_fail_initialize_ = times_to_fail_reinitialize_;
 189     times_to_fail_reinitialize_ = 0;
 190     times_to_lose_on_create_ = times_to_lose_on_recreate_;
 191     times_to_lose_on_recreate_ = 0;
 192     times_to_fail_create_offscreen_ = times_to_fail_recreate_offscreen_;
 193     times_to_fail_recreate_offscreen_ = 0;
 194   }
 195
 196   virtual void WillRetryRecreateOutputSurface() OVERRIDE {
 197     ++times_recreate_retried_;
 198   }
 199
 200   virtual void TearDown() OVERRIDE {
 201     LayerTreeTest::TearDown();
 202     EXPECT_EQ(times_to_expect_recreate_retried_, times_recreate_retried_);
 203   }
 204
 205   void ExpectRecreateToRetry() {
 206     if (committed_at_least_once_)
 207       ++times_to_expect_recreate_retried_;
 208   }
 209
 210  protected:
 211   TestWebGraphicsContext3D* context3d_;
 212   int times_to_fail_create_;
 213   int times_to_fail_initialize_;
 214   int times_to_lose_on_create_;
 215   int times_to_lose_during_commit_;
 216   int times_to_lose_during_draw_;
 217   int times_to_fail_recreate_;
 218   int times_to_fail_reinitialize_;
 219   int times_to_lose_on_recreate_;
 220   int times_to_fail_create_offscreen_;
 221   int times_to_fail_recreate_offscreen_;
 222   int times_to_expect_recreate_retried_;
 223   int times_recreate_retried_;
 224   int times_offscreen_created_;
 225   bool committed_at_least_once_;
 226
 227   scoped_refptr<FakeContextProvider> offscreen_contexts_main_thread_;
 228   scoped_refptr<FakeContextProvider> offscreen_contexts_compositor_thread_;
 229 };
 230
 231 class LayerTreeHostContextTestLostContextSucceeds
 232     : public LayerTreeHostContextTest {
 233  public:
 234   LayerTreeHostContextTestLostContextSucceeds()
 235       : LayerTreeHostContextTest(),
 236         test_case_(0),
 237         num_losses_(0),
 238         recovered_context_(true) {}
 239
 240   virtual void BeginTest() OVERRIDE {
 241     PostSetNeedsCommitToMainThread();
 242   }
 243
 244   virtual void DidRecreateOutputSurface(bool succeeded) OVERRIDE {
 245     EXPECT_TRUE(succeeded);
 246     ++num_losses_;
 247     recovered_context_ = true;
 248   }
 249
 250   virtual void AfterTest() OVERRIDE {
 251     EXPECT_EQ(10u, test_case_);
 252     EXPECT_EQ(8 + 10 + 10, num_losses_);
 253   }
 254
 255   virtual void DidCommitAndDrawFrame() OVERRIDE {
 256     // If the last frame had a context loss, then we'll commit again to
 257     // recover.
 258     if (!recovered_context_)
 259       return;
 260     if (times_to_lose_during_commit_)
 261       return;
 262     if (times_to_lose_during_draw_)
 263       return;
 264
 265     recovered_context_ = false;
 266     if (NextTestCase())
 267       InvalidateAndSetNeedsCommit();
 268     else
 269       EndTest();
 270   }
 271
 272   virtual void InvalidateAndSetNeedsCommit() {
 273     // Cause damage so we try to draw.
 274     layer_tree_host()->root_layer()->SetNeedsDisplay();
 275   }
 276
 277   bool NextTestCase() {
 278     static const TestCase kTests[] = {
 279       // Losing the context and failing to recreate it (or losing it again
 280       // immediately) a small number of times should succeed.
 281       { 1,  // times_to_lose_during_commit
 282         0,  // times_to_lose_during_draw
 283         3,  // times_to_fail_reinitialize
 284         0,  // times_to_fail_recreate
 285         0,  // times_to_lose_on_recreate
 286         0,  // times_to_fail_recreate_offscreen
 287       },
 288       { 0,  // times_to_lose_during_commit
 289         1,  // times_to_lose_during_draw
 290         3,  // times_to_fail_reinitialize
 291         0,  // times_to_fail_recreate
 292         0,  // times_to_lose_on_recreate
 293         0,  // times_to_fail_recreate_offscreen
 294       },
 295       { 1,  // times_to_lose_during_commit
 296         0,  // times_to_lose_during_draw
 297         0,  // times_to_fail_reinitialize
 298         3,  // times_to_fail_recreate
 299         0,  // times_to_lose_on_recreate
 300         0,  // times_to_fail_recreate_offscreen
 301       },
 302       { 0,  // times_to_lose_during_commit
 303         1,  // times_to_lose_during_draw
 304         0,  // times_to_fail_reinitialize
 305         3,  // times_to_fail_recreate
 306         0,  // times_to_lose_on_recreate
 307         0,  // times_to_fail_recreate_offscreen
 308       },
 309       { 1,  // times_to_lose_during_commit
 310         0,  // times_to_lose_during_draw
 311         0,  // times_to_fail_reinitialize
 312         0,  // times_to_fail_recreate
 313         3,  // times_to_lose_on_recreate
 314         0,  // times_to_fail_recreate_offscreen
 315       },
 316       { 0,  // times_to_lose_during_commit
 317         1,  // times_to_lose_during_draw
 318         0,  // times_to_fail_reinitialize
 319         0,  // times_to_fail_recreate
 320         3,  // times_to_lose_on_recreate
 321         0,  // times_to_fail_recreate_offscreen
 322       },
 323       { 1,  // times_to_lose_during_commit
 324         0,  // times_to_lose_during_draw
 325         0,  // times_to_fail_reinitialize
 326         0,  // times_to_fail_recreate
 327         0,  // times_to_lose_on_recreate
 328         3,  // times_to_fail_recreate_offscreen
 329       },
 330       { 0,  // times_to_lose_during_commit
 331         1,  // times_to_lose_during_draw
 332         0,  // times_to_fail_reinitialize
 333         0,  // times_to_fail_recreate
 334         0,  // times_to_lose_on_recreate
 335         3,  // times_to_fail_recreate_offscreen
 336       },
 337       // Losing the context and recreating it any number of times should
 338       // succeed.
 339       { 10,  // times_to_lose_during_commit
 340         0,  // times_to_lose_during_draw
 341         0,  // times_to_fail_reinitialize
 342         0,  // times_to_fail_recreate
 343         0,  // times_to_lose_on_recreate
 344         0,  // times_to_fail_recreate_offscreen
 345       },
 346       { 0,  // times_to_lose_during_commit
 347         10,  // times_to_lose_during_draw
 348         0,  // times_to_fail_reinitialize
 349         0,  // times_to_fail_recreate
 350         0,  // times_to_lose_on_recreate
 351         0,  // times_to_fail_recreate_offscreen
 352       },
 353     };
 354
 355     if (test_case_ >= arraysize(kTests))
 356       return false;
 357
 358     times_to_lose_during_commit_ =
 359         kTests[test_case_].times_to_lose_during_commit;
 360     times_to_lose_during_draw_ =
 361         kTests[test_case_].times_to_lose_during_draw;
 362     times_to_fail_reinitialize_ = kTests[test_case_].times_to_fail_reinitialize;
 363     times_to_fail_recreate_ = kTests[test_case_].times_to_fail_recreate;
 364     times_to_lose_on_recreate_ = kTests[test_case_].times_to_lose_on_recreate;
 365     times_to_fail_recreate_offscreen_ =
 366         kTests[test_case_].times_to_fail_recreate_offscreen;
 367     ++test_case_;
 368     return true;
 369   }
 370
 371   struct TestCase {
 372     int times_to_lose_during_commit;
 373     int times_to_lose_during_draw;
 374     int times_to_fail_reinitialize;
 375     int times_to_fail_recreate;
 376     int times_to_lose_on_recreate;
 377     int times_to_fail_recreate_offscreen;
 378   };
 379
 380  protected:
 381   size_t test_case_;
 382   int num_losses_;
 383   bool recovered_context_;
 384 };
 385
 386 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestLostContextSucceeds);
 387
 388 class LayerTreeHostContextTestLostContextSucceedsWithContent
 389     : public LayerTreeHostContextTestLostContextSucceeds {
 390  public:
 391   LayerTreeHostContextTestLostContextSucceedsWithContent()
 392       : LayerTreeHostContextTestLostContextSucceeds() {}
 393
 394   virtual void SetupTree() OVERRIDE {
 395     root_ = Layer::Create();
 396     root_->SetBounds(gfx::Size(10, 10));
 397     root_->SetAnchorPoint(gfx::PointF());
 398     root_->SetIsDrawable(true);
 399
 400     content_ = FakeContentLayer::Create(&client_);
 401     content_->SetBounds(gfx::Size(10, 10));
 402     content_->SetAnchorPoint(gfx::PointF());
 403     content_->SetIsDrawable(true);
 404     if (use_surface_) {
 405       content_->SetForceRenderSurface(true);
 406       // Filters require us to create an offscreen context.
 407       WebKit::WebFilterOperations filters;
 408       filters.append(WebKit::WebFilterOperation::createGrayscaleFilter(0.5f));
 409       content_->SetFilters(filters);
 410       content_->SetBackgroundFilters(filters);
 411     }
 412
 413     root_->AddChild(content_);
 414
 415     layer_tree_host()->SetRootLayer(root_);
 416     LayerTreeHostContextTest::SetupTree();
 417   }
 418
 419   virtual void InvalidateAndSetNeedsCommit() OVERRIDE {
 420     // Invalidate the render surface so we don't try to use a cached copy of the
 421     // surface.  We want to make sure to test the drawing paths for drawing to
 422     // a child surface.
 423     content_->SetNeedsDisplay();
 424     LayerTreeHostContextTestLostContextSucceeds::InvalidateAndSetNeedsCommit();
 425   }
 426
 427   virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
 428     FakeContentLayerImpl* content_impl = static_cast<FakeContentLayerImpl*>(
 429         host_impl->active_tree()->root_layer()->children()[0]);
 430     // Even though the context was lost, we should have a resource. The
 431     // TestWebGraphicsContext3D ensures that this resource is created with
 432     // the active context.
 433     EXPECT_TRUE(content_impl->HaveResourceForTileAt(0, 0));
 434
 435     cc::ContextProvider* contexts =
 436         host_impl->resource_provider()->offscreen_context_provider();
 437     if (use_surface_) {
 438       EXPECT_TRUE(contexts->Context3d());
 439       // TODO(danakj): Make a fake GrContext.
 440       // EXPECT_TRUE(contexts->GrContext());
 441     } else {
 442       EXPECT_FALSE(contexts);
 443     }
 444   }
 445
 446   virtual void AfterTest() OVERRIDE {
 447     LayerTreeHostContextTestLostContextSucceeds::AfterTest();
 448     if (use_surface_) {
 449       // 1 create to start with +
 450       // 6 from test cases that fail on initializing the renderer (after the
 451       // offscreen context is created) +
 452       // 6 from test cases that lose the offscreen context directly +
 453       // All the test cases that recreate both contexts only once
 454       // per time it is lost.
 455       EXPECT_EQ(6 + 6 + 1 + num_losses_, times_offscreen_created_);
 456     } else {
 457       EXPECT_EQ(0, times_offscreen_created_);
 458     }
 459   }
 460
 461  protected:
 462   bool use_surface_;
 463   FakeContentLayerClient client_;
 464   scoped_refptr<Layer> root_;
 465   scoped_refptr<ContentLayer> content_;
 466 };
 467
 468 TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
 469        NoSurface_SingleThread) {
 470   use_surface_ = false;
 471   RunTest(false);
 472 }
 473
 474 TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
 475        NoSurface_MultiThread) {
 476   use_surface_ = false;
 477   RunTest(true);
 478 }
 479
 480 TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
 481        WithSurface_SingleThread) {
 482   use_surface_ = true;
 483   RunTest(false);
 484 }
 485
 486 TEST_F(LayerTreeHostContextTestLostContextSucceedsWithContent,
 487        WithSurface_MultiThread) {
 488   use_surface_ = true;
 489   RunTest(true);
 490 }
 491
 492 class LayerTreeHostContextTestOffscreenContextFails
 493     : public LayerTreeHostContextTest {
 494  public:
 495   virtual void SetupTree() OVERRIDE {
 496     root_ = Layer::Create();
 497     root_->SetBounds(gfx::Size(10, 10));
 498     root_->SetAnchorPoint(gfx::PointF());
 499     root_->SetIsDrawable(true);
 500
 501     content_ = FakeContentLayer::Create(&client_);
 502     content_->SetBounds(gfx::Size(10, 10));
 503     content_->SetAnchorPoint(gfx::PointF());
 504     content_->SetIsDrawable(true);
 505     content_->SetForceRenderSurface(true);
 506     // Filters require us to create an offscreen context.
 507     WebKit::WebFilterOperations filters;
 508     filters.append(WebKit::WebFilterOperation::createGrayscaleFilter(0.5f));
 509     content_->SetFilters(filters);
 510     content_->SetBackgroundFilters(filters);
 511
 512     root_->AddChild(content_);
 513
 514     layer_tree_host()->SetRootLayer(root_);
 515     LayerTreeHostContextTest::SetupTree();
 516   }
 517
 518   virtual void BeginTest() OVERRIDE {
 519     times_to_fail_create_offscreen_ = 1;
 520     PostSetNeedsCommitToMainThread();
 521   }
 522
 523   virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
 524     cc::ContextProvider* contexts =
 525         host_impl->resource_provider()->offscreen_context_provider();
 526     EXPECT_FALSE(contexts);
 527     EndTest();
 528   }
 529
 530   virtual void AfterTest() OVERRIDE {}
 531
 532  protected:
 533   FakeContentLayerClient client_;
 534   scoped_refptr<Layer> root_;
 535   scoped_refptr<ContentLayer> content_;
 536 };
 537
 538 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestOffscreenContextFails);
 539
 540 class LayerTreeHostContextTestLostContextFails
 541     : public LayerTreeHostContextTest {
 542  public:
 543   LayerTreeHostContextTestLostContextFails()
 544       : LayerTreeHostContextTest(),
 545         num_commits_(0) {
 546     times_to_lose_during_commit_ = 1;
 547   }
 548
 549   virtual void BeginTest() OVERRIDE {
 550     PostSetNeedsCommitToMainThread();
 551   }
 552
 553   virtual void DidRecreateOutputSurface(bool succeeded) OVERRIDE {
 554     EXPECT_FALSE(succeeded);
 555     EndTest();
 556   }
 557
 558   virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
 559     LayerTreeHostContextTest::CommitCompleteOnThread(host_impl);
 560
 561     ++num_commits_;
 562     if (num_commits_ == 1) {
 563       // When the context is ok, we should have these things.
 564       EXPECT_TRUE(host_impl->output_surface());
 565       EXPECT_TRUE(host_impl->renderer());
 566       EXPECT_TRUE(host_impl->resource_provider());
 567       return;
 568     }
 569
 570     // When context recreation fails we shouldn't be left with any of them.
 571     EXPECT_FALSE(host_impl->output_surface());
 572     EXPECT_FALSE(host_impl->renderer());
 573     EXPECT_FALSE(host_impl->resource_provider());
 574   }
 575
 576   virtual void AfterTest() OVERRIDE {}
 577
 578  private:
 579   int num_commits_;
 580 };
 581
 582 TEST_F(LayerTreeHostContextTestLostContextFails,
 583        FailReinitialize100_SingleThread) {
 584   times_to_fail_reinitialize_ = 100;
 585   times_to_fail_recreate_ = 0;
 586   times_to_lose_on_recreate_ = 0;
 587   RunTest(false);
 588 }
 589
 590 TEST_F(LayerTreeHostContextTestLostContextFails,
 591        FailReinitialize100_MultiThread) {
 592   times_to_fail_reinitialize_ = 100;
 593   times_to_fail_recreate_ = 0;
 594   times_to_lose_on_recreate_ = 0;
 595   RunTest(true);
 596 }
 597
 598 TEST_F(LayerTreeHostContextTestLostContextFails,
 599        FailRecreate100_SingleThread) {
 600   times_to_fail_reinitialize_ = 0;
 601   times_to_fail_recreate_ = 100;
 602   times_to_lose_on_recreate_ = 0;
 603   RunTest(false);
 604 }
 605
 606 TEST_F(LayerTreeHostContextTestLostContextFails,
 607        FailRecreate100_MultiThread) {
 608   times_to_fail_reinitialize_ = 0;
 609   times_to_fail_recreate_ = 100;
 610   times_to_lose_on_recreate_ = 0;
 611   RunTest(true);
 612 }
 613
 614 TEST_F(LayerTreeHostContextTestLostContextFails,
 615        LoseOnRecreate100_SingleThread) {
 616   times_to_fail_reinitialize_ = 0;
 617   times_to_fail_recreate_ = 0;
 618   times_to_lose_on_recreate_ = 100;
 619   RunTest(false);
 620 }
 621
 622 TEST_F(LayerTreeHostContextTestLostContextFails,
 623        LoseOnRecreate100_MultiThread) {
 624   times_to_fail_reinitialize_ = 0;
 625   times_to_fail_recreate_ = 0;
 626   times_to_lose_on_recreate_ = 100;
 627   RunTest(true);
 628 }
 629
 630 class LayerTreeHostContextTestFinishAllRenderingAfterLoss
 631     : public LayerTreeHostContextTest {
 632  public:
 633   virtual void BeginTest() OVERRIDE {
 634     // Lose the context until the compositor gives up on it.
 635     times_to_lose_during_commit_ = 1;
 636     times_to_fail_reinitialize_ = 10;
 637     PostSetNeedsCommitToMainThread();
 638   }
 639
 640   virtual void DidRecreateOutputSurface(bool succeeded) OVERRIDE {
 641     EXPECT_FALSE(succeeded);
 642     layer_tree_host()->FinishAllRendering();
 643     EndTest();
 644   }
 645
 646   virtual void AfterTest() OVERRIDE {}
 647 };
 648
 649 SINGLE_AND_MULTI_THREAD_TEST_F(
 650     LayerTreeHostContextTestFinishAllRenderingAfterLoss);
 651
 652 class LayerTreeHostContextTestLostContextAndEvictTextures
 653     : public LayerTreeHostContextTest {
 654  public:
 655   LayerTreeHostContextTestLostContextAndEvictTextures()
 656       : LayerTreeHostContextTest(),
 657         layer_(FakeContentLayer::Create(&client_)),
 658         impl_host_(0),
 659         num_commits_(0) {}
 660
 661   virtual void SetupTree() OVERRIDE {
 662     layer_->SetBounds(gfx::Size(10, 20));
 663     layer_tree_host()->SetRootLayer(layer_);
 664     LayerTreeHostContextTest::SetupTree();
 665   }
 666
 667   virtual void BeginTest() OVERRIDE {
 668     PostSetNeedsCommitToMainThread();
 669   }
 670
 671   void PostEvictTextures() {
 672     if (ImplThread()) {
 673       ImplThread()->PostTask(
 674           base::Bind(
 675               &LayerTreeHostContextTestLostContextAndEvictTextures::
 676               EvictTexturesOnImplThread,
 677               base::Unretained(this)));
 678     } else {
 679       DebugScopedSetImplThread impl(proxy());
 680       EvictTexturesOnImplThread();
 681     }
 682   }
 683
 684   void EvictTexturesOnImplThread() {
 685     impl_host_->EnforceManagedMemoryPolicy(ManagedMemoryPolicy(0));
 686     if (lose_after_evict_)
 687       LoseContext();
 688   }
 689
 690   virtual void DidCommitAndDrawFrame() OVERRIDE {
 691     if (num_commits_ > 1)
 692       return;
 693     EXPECT_TRUE(layer_->HaveBackingAt(0, 0));
 694     PostEvictTextures();
 695   }
 696
 697   virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
 698     LayerTreeHostContextTest::CommitCompleteOnThread(impl);
 699     if (num_commits_ > 1)
 700       return;
 701     ++num_commits_;
 702     if (!lose_after_evict_)
 703       LoseContext();
 704     impl_host_ = impl;
 705   }
 706
 707   virtual void DidRecreateOutputSurface(bool succeeded) OVERRIDE {
 708     EXPECT_TRUE(succeeded);
 709     EndTest();
 710   }
 711
 712   virtual void AfterTest() OVERRIDE {}
 713
 714  protected:
 715   bool lose_after_evict_;
 716   FakeContentLayerClient client_;
 717   scoped_refptr<FakeContentLayer> layer_;
 718   LayerTreeHostImpl* impl_host_;
 719   int num_commits_;
 720 };
 721
 722 TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
 723        LoseAfterEvict_SingleThread) {
 724   lose_after_evict_ = true;
 725   RunTest(false);
 726 }
 727
 728 TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
 729        LoseAfterEvict_MultiThread) {
 730   lose_after_evict_ = true;
 731   RunTest(true);
 732 }
 733
 734 TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
 735        LoseBeforeEvict_SingleThread) {
 736   lose_after_evict_ = false;
 737   RunTest(false);
 738 }
 739
 740 TEST_F(LayerTreeHostContextTestLostContextAndEvictTextures,
 741        LoseBeforeEvict_MultiThread) {
 742   lose_after_evict_ = false;
 743   RunTest(true);
 744 }
 745
 746 class LayerTreeHostContextTestLostContextWhileUpdatingResources
 747     : public LayerTreeHostContextTest {
 748  public:
 749   LayerTreeHostContextTestLostContextWhileUpdatingResources()
 750       : parent_(FakeContentLayer::Create(&client_)),
 751         num_children_(50),
 752         times_to_lose_on_end_query_(3) {}
 753
 754   virtual scoped_ptr<TestWebGraphicsContext3D> CreateContext3d() OVERRIDE {
 755     scoped_ptr<TestWebGraphicsContext3D> context =
 756         LayerTreeHostContextTest::CreateContext3d();
 757     if (times_to_lose_on_end_query_) {
 758       --times_to_lose_on_end_query_;
 759       context->set_times_end_query_succeeds(5);
 760     }
 761     return context.Pass();
 762   }
 763
 764   virtual void SetupTree() OVERRIDE {
 765     parent_->SetBounds(gfx::Size(num_children_, 1));
 766
 767     for (int i = 0; i < num_children_; i++) {
 768       scoped_refptr<FakeContentLayer> child =
 769           FakeContentLayer::Create(&client_);
 770       child->SetPosition(gfx::PointF(i, 0.f));
 771       child->SetBounds(gfx::Size(1, 1));
 772       parent_->AddChild(child);
 773     }
 774
 775     layer_tree_host()->SetRootLayer(parent_);
 776     LayerTreeHostContextTest::SetupTree();
 777   }
 778
 779   virtual void BeginTest() OVERRIDE {
 780     PostSetNeedsCommitToMainThread();
 781   }
 782
 783   virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
 784     LayerTreeHostContextTest::CommitCompleteOnThread(impl);
 785     EndTest();
 786   }
 787
 788   virtual void DidRecreateOutputSurface(bool succeeded) OVERRIDE {
 789     EXPECT_TRUE(succeeded);
 790   }
 791
 792   virtual void AfterTest() OVERRIDE {
 793     EXPECT_EQ(0, times_to_lose_on_end_query_);
 794   }
 795
 796  private:
 797   FakeContentLayerClient client_;
 798   scoped_refptr<FakeContentLayer> parent_;
 799   int num_children_;
 800   int times_to_lose_on_end_query_;
 801 };
 802
 803 SINGLE_AND_MULTI_THREAD_TEST_F(
 804     LayerTreeHostContextTestLostContextWhileUpdatingResources);
 805
 806 class LayerTreeHostContextTestLayersNotified
 807     : public LayerTreeHostContextTest {
 808  public:
 809   LayerTreeHostContextTestLayersNotified()
 810       : LayerTreeHostContextTest(),
 811         num_commits_(0) {}
 812
 813   virtual void SetupTree() OVERRIDE {
 814     root_ = FakeContentLayer::Create(&client_);
 815     child_ = FakeContentLayer::Create(&client_);
 816     grandchild_ = FakeContentLayer::Create(&client_);
 817
 818     root_->AddChild(child_);
 819     child_->AddChild(grandchild_);
 820
 821     layer_tree_host()->SetRootLayer(root_);
 822     LayerTreeHostContextTest::SetupTree();
 823   }
 824
 825   virtual void BeginTest() OVERRIDE {
 826     PostSetNeedsCommitToMainThread();
 827   }
 828
 829   virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
 830     LayerTreeHostContextTest::CommitCompleteOnThread(host_impl);
 831
 832     FakeContentLayerImpl* root = static_cast<FakeContentLayerImpl*>(
 833         host_impl->active_tree()->root_layer());
 834     FakeContentLayerImpl* child = static_cast<FakeContentLayerImpl*>(
 835         root->children()[0]);
 836     FakeContentLayerImpl* grandchild = static_cast<FakeContentLayerImpl*>(
 837         child->children()[0]);
 838
 839     ++num_commits_;
 840     switch (num_commits_) {
 841       case 1:
 842         EXPECT_EQ(0u, root->lost_output_surface_count());
 843         EXPECT_EQ(0u, child->lost_output_surface_count());
 844         EXPECT_EQ(0u, grandchild->lost_output_surface_count());
 845         // Lose the context and struggle to recreate it.
 846         LoseContext();
 847         times_to_fail_create_ = 1;
 848         break;
 849       case 2:
 850         EXPECT_EQ(1u, root->lost_output_surface_count());
 851         EXPECT_EQ(1u, child->lost_output_surface_count());
 852         EXPECT_EQ(1u, grandchild->lost_output_surface_count());
 853         // Lose the context and again during recreate.
 854         LoseContext();
 855         times_to_lose_on_create_ = 1;
 856         break;
 857       case 3:
 858         EXPECT_EQ(3u, root->lost_output_surface_count());
 859         EXPECT_EQ(3u, child->lost_output_surface_count());
 860         EXPECT_EQ(3u, grandchild->lost_output_surface_count());
 861         // Lose the context and again during reinitialization.
 862         LoseContext();
 863         times_to_fail_initialize_ = 1;
 864         break;
 865       case 4:
 866         EXPECT_EQ(5u, root->lost_output_surface_count());
 867         EXPECT_EQ(5u, child->lost_output_surface_count());
 868         EXPECT_EQ(5u, grandchild->lost_output_surface_count());
 869         EndTest();
 870         break;
 871       default:
 872         NOTREACHED();
 873     }
 874   }
 875
 876   virtual void AfterTest() OVERRIDE {}
 877
 878  private:
 879   int num_commits_;
 880
 881   FakeContentLayerClient client_;
 882   scoped_refptr<FakeContentLayer> root_;
 883   scoped_refptr<FakeContentLayer> child_;
 884   scoped_refptr<FakeContentLayer> grandchild_;
 885 };
 886
 887 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestLayersNotified);
 888
 889 class LayerTreeHostContextTestDontUseLostResources
 890     : public LayerTreeHostContextTest {
 891  public:
 892   virtual void SetupTree() OVERRIDE {
 893     context3d_->set_have_extension_io_surface(true);
 894     context3d_->set_have_extension_egl_image(true);
 895
 896     scoped_refptr<Layer> root_ = Layer::Create();
 897     root_->SetBounds(gfx::Size(10, 10));
 898     root_->SetAnchorPoint(gfx::PointF());
 899     root_->SetIsDrawable(true);
 900
 901     scoped_refptr<FakeDelegatedRendererLayer> delegated_ =
 902         FakeDelegatedRendererLayer::Create();
 903     delegated_->SetBounds(gfx::Size(10, 10));
 904     delegated_->SetAnchorPoint(gfx::PointF());
 905     delegated_->SetIsDrawable(true);
 906     root_->AddChild(delegated_);
 907
 908     scoped_refptr<ContentLayer> content_ = ContentLayer::Create(&client_);
 909     content_->SetBounds(gfx::Size(10, 10));
 910     content_->SetAnchorPoint(gfx::PointF());
 911     content_->SetIsDrawable(true);
 912     root_->AddChild(content_);
 913
 914     scoped_refptr<TextureLayer> texture_ = TextureLayer::Create(NULL);
 915     texture_->SetBounds(gfx::Size(10, 10));
 916     texture_->SetAnchorPoint(gfx::PointF());
 917     texture_->SetTextureId(TestWebGraphicsContext3D::kExternalTextureId);
 918     texture_->SetIsDrawable(true);
 919     root_->AddChild(texture_);
 920
 921     scoped_refptr<ContentLayer> mask_ = ContentLayer::Create(&client_);
 922     mask_->SetBounds(gfx::Size(10, 10));
 923     mask_->SetAnchorPoint(gfx::PointF());
 924
 925     scoped_refptr<ContentLayer> content_with_mask_ =
 926         ContentLayer::Create(&client_);
 927     content_with_mask_->SetBounds(gfx::Size(10, 10));
 928     content_with_mask_->SetAnchorPoint(gfx::PointF());
 929     content_with_mask_->SetIsDrawable(true);
 930     content_with_mask_->SetMaskLayer(mask_.get());
 931     root_->AddChild(content_with_mask_);
 932
 933     scoped_refptr<VideoLayer> video_color_ = VideoLayer::Create(
 934         &color_frame_provider_);
 935     video_color_->SetBounds(gfx::Size(10, 10));
 936     video_color_->SetAnchorPoint(gfx::PointF());
 937     video_color_->SetIsDrawable(true);
 938     root_->AddChild(video_color_);
 939
 940     scoped_refptr<VideoLayer> video_hw_ = VideoLayer::Create(
 941         &hw_frame_provider_);
 942     video_hw_->SetBounds(gfx::Size(10, 10));
 943     video_hw_->SetAnchorPoint(gfx::PointF());
 944     video_hw_->SetIsDrawable(true);
 945     root_->AddChild(video_hw_);
 946
 947     scoped_refptr<VideoLayer> video_scaled_hw_ = VideoLayer::Create(
 948         &scaled_hw_frame_provider_);
 949     video_scaled_hw_->SetBounds(gfx::Size(10, 10));
 950     video_scaled_hw_->SetAnchorPoint(gfx::PointF());
 951     video_scaled_hw_->SetIsDrawable(true);
 952     root_->AddChild(video_scaled_hw_);
 953
 954     scoped_refptr<IOSurfaceLayer> io_surface_ = IOSurfaceLayer::Create();
 955     io_surface_->SetBounds(gfx::Size(10, 10));
 956     io_surface_->SetAnchorPoint(gfx::PointF());
 957     io_surface_->SetIsDrawable(true);
 958     io_surface_->SetIOSurfaceProperties(1, gfx::Size(10, 10));
 959     root_->AddChild(io_surface_);
 960
 961     // Enable the hud.
 962     LayerTreeDebugState debug_state;
 963     debug_state.show_property_changed_rects = true;
 964     layer_tree_host()->SetDebugState(debug_state);
 965
 966     bool paint_scrollbar = true;
 967     bool has_thumb = true;
 968     scoped_refptr<ScrollbarLayer> scrollbar_ = ScrollbarLayer::Create(
 969         FakeWebScrollbar::Create().PassAs<WebKit::WebScrollbar>(),
 970         FakeScrollbarThemePainter::Create(paint_scrollbar)
 971             .PassAs<ScrollbarThemePainter>(),
 972         FakeWebScrollbarThemeGeometry::Create(has_thumb)
 973             .PassAs<WebKit::WebScrollbarThemeGeometry>(),
 974         content_->id());
 975     scrollbar_->SetBounds(gfx::Size(10, 10));
 976     scrollbar_->SetAnchorPoint(gfx::PointF());
 977     scrollbar_->SetIsDrawable(true);
 978     root_->AddChild(scrollbar_);
 979
 980     layer_tree_host()->SetRootLayer(root_);
 981     LayerTreeHostContextTest::SetupTree();
 982   }
 983
 984   virtual void BeginTest() OVERRIDE {
 985     PostSetNeedsCommitToMainThread();
 986   }
 987
 988   virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) OVERRIDE {
 989     LayerTreeHostContextTest::CommitCompleteOnThread(host_impl);
 990
 991     ResourceProvider* resource_provider = host_impl->resource_provider();
 992
 993     if (host_impl->active_tree()->source_frame_number() == 0) {
 994       // Set up impl resources on the first commit.
 995
 996       scoped_ptr<TestRenderPass> pass_for_quad = TestRenderPass::Create();
 997       pass_for_quad->SetNew(
 998           // AppendOneOfEveryQuadType() makes a RenderPass quad with this id.
 999           RenderPass::Id(1, 1),
1000           gfx::Rect(0, 0, 10, 10),
1001           gfx::Rect(0, 0, 10, 10),
1002           gfx::Transform());
1003
1004       scoped_ptr<TestRenderPass> pass = TestRenderPass::Create();
1005       pass->SetNew(
1006           RenderPass::Id(2, 1),
1007           gfx::Rect(0, 0, 10, 10),
1008           gfx::Rect(0, 0, 10, 10),
1009           gfx::Transform());
1010       pass->AppendOneOfEveryQuadType(resource_provider, RenderPass::Id(2, 1));
1011
1012       ScopedPtrVector<RenderPass> pass_list;
1013       pass_list.push_back(pass_for_quad.PassAs<RenderPass>());
1014       pass_list.push_back(pass.PassAs<RenderPass>());
1015
1016       // First child is the delegated layer.
1017       FakeDelegatedRendererLayerImpl* delegated_impl =
1018           static_cast<FakeDelegatedRendererLayerImpl*>(
1019               host_impl->active_tree()->root_layer()->children()[0]);
1020       delegated_impl->SetFrameDataForRenderPasses(&pass_list);
1021       EXPECT_TRUE(pass_list.empty());
1022
1023       color_video_frame_ = VideoFrame::CreateColorFrame(
1024           gfx::Size(4, 4), 0x80, 0x80, 0x80, base::TimeDelta());
1025       hw_video_frame_ = VideoFrame::WrapNativeTexture(
1026           resource_provider->GraphicsContext3D()->createTexture(),
1027           GL_TEXTURE_2D,
1028           gfx::Size(4, 4), gfx::Rect(0, 0, 4, 4), gfx::Size(4, 4),
1029           base::TimeDelta(),
1030           VideoFrame::ReadPixelsCB(),
1031           base::Closure());
1032       scaled_hw_video_frame_ = VideoFrame::WrapNativeTexture(
1033           resource_provider->GraphicsContext3D()->createTexture(),
1034           GL_TEXTURE_2D,
1035           gfx::Size(4, 4), gfx::Rect(0, 0, 3, 2), gfx::Size(4, 4),
1036           base::TimeDelta(),
1037           VideoFrame::ReadPixelsCB(),
1038           base::Closure());
1039
1040       color_frame_provider_.set_frame(color_video_frame_);
1041       hw_frame_provider_.set_frame(hw_video_frame_);
1042       scaled_hw_frame_provider_.set_frame(scaled_hw_video_frame_);
1043       return;
1044     }
1045
1046     if (host_impl->active_tree()->source_frame_number() == 3) {
1047       // On the third commit we're recovering from context loss. Hardware
1048       // video frames should not be reused by the VideoFrameProvider, but
1049       // software frames can be.
1050       hw_frame_provider_.set_frame(NULL);
1051       scaled_hw_frame_provider_.set_frame(NULL);
1052     }
1053   }
1054
1055   virtual bool PrepareToDrawOnThread(LayerTreeHostImpl* host_impl,
1056                                      LayerTreeHostImpl::FrameData* frame,
1057                                      bool result) OVERRIDE {
1058     if (host_impl->active_tree()->source_frame_number() == 2) {
1059       // Lose the context during draw on the second commit. This will cause
1060       // a third commit to recover.
1061       if (context3d_)
1062         context3d_->set_times_bind_texture_succeeds(4);
1063     }
1064     return true;
1065   }
1066
1067   virtual void DidCommitAndDrawFrame() OVERRIDE {
1068     ASSERT_TRUE(layer_tree_host()->hud_layer());
1069     // End the test once we know the 3nd frame drew.
1070     if (layer_tree_host()->commit_number() == 4)
1071       EndTest();
1072     else
1073       layer_tree_host()->SetNeedsCommit();
1074   }
1075
1076   virtual void AfterTest() OVERRIDE {}
1077
1078  private:
1079   FakeContentLayerClient client_;
1080
1081   scoped_refptr<Layer> root_;
1082   scoped_refptr<DelegatedRendererLayer> delegated_;
1083   scoped_refptr<ContentLayer> content_;
1084   scoped_refptr<TextureLayer> texture_;
1085   scoped_refptr<ContentLayer> mask_;
1086   scoped_refptr<ContentLayer> content_with_mask_;
1087   scoped_refptr<VideoLayer> video_color_;
1088   scoped_refptr<VideoLayer> video_hw_;
1089   scoped_refptr<VideoLayer> video_scaled_hw_;
1090   scoped_refptr<IOSurfaceLayer> io_surface_;
1091   scoped_refptr<ScrollbarLayer> scrollbar_;
1092
1093   scoped_refptr<VideoFrame> color_video_frame_;
1094   scoped_refptr<VideoFrame> hw_video_frame_;
1095   scoped_refptr<VideoFrame> scaled_hw_video_frame_;
1096
1097   FakeVideoFrameProvider color_frame_provider_;
1098   FakeVideoFrameProvider hw_frame_provider_;
1099   FakeVideoFrameProvider scaled_hw_frame_provider_;
1100 };
1101
1102 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestDontUseLostResources);
1103
1104 class LayerTreeHostContextTestFailsImmediately
1105     : public LayerTreeHostContextTest {
1106  public:
1107   LayerTreeHostContextTestFailsImmediately()
1108       : LayerTreeHostContextTest() {}
1109
1110   virtual ~LayerTreeHostContextTestFailsImmediately() {}
1111
1112   virtual void BeginTest() OVERRIDE {
1113     PostSetNeedsCommitToMainThread();
1114   }
1115
1116   virtual void AfterTest() OVERRIDE {}
1117
1118   virtual scoped_ptr<TestWebGraphicsContext3D> CreateContext3d() OVERRIDE {
1119     scoped_ptr<TestWebGraphicsContext3D> context =
1120         LayerTreeHostContextTest::CreateContext3d();
1121     context->loseContextCHROMIUM(GL_GUILTY_CONTEXT_RESET_ARB,
1122                                  GL_INNOCENT_CONTEXT_RESET_ARB);
1123     return context.Pass();
1124   }
1125
1126   virtual void DidRecreateOutputSurface(bool succeeded) OVERRIDE {
1127     EXPECT_FALSE(succeeded);
1128     // If we make it this far without crashing, we pass!
1129     EndTest();
1130   }
1131 };
1132
1133 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostContextTestFailsImmediately);
1134
1135 class ImplSidePaintingLayerTreeHostContextTest
1136     : public LayerTreeHostContextTest {
1137  public:
1138   virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
1139     settings->impl_side_painting = true;
1140   }
1141 };
1142
1143 class LayerTreeHostContextTestImplSidePainting
1144     : public ImplSidePaintingLayerTreeHostContextTest {
1145  public:
1146   virtual void SetupTree() OVERRIDE {
1147     scoped_refptr<Layer> root = Layer::Create();
1148     root->SetBounds(gfx::Size(10, 10));
1149     root->SetAnchorPoint(gfx::PointF());
1150     root->SetIsDrawable(true);
1151
1152     scoped_refptr<PictureLayer> picture = PictureLayer::Create(&client_);
1153     picture->SetBounds(gfx::Size(10, 10));
1154     picture->SetAnchorPoint(gfx::PointF());
1155     picture->SetIsDrawable(true);
1156     root->AddChild(picture);
1157
1158     layer_tree_host()->SetRootLayer(root);
1159     LayerTreeHostContextTest::SetupTree();
1160   }
1161
1162   virtual void BeginTest() OVERRIDE {
1163     times_to_lose_during_commit_ = 1;
1164     PostSetNeedsCommitToMainThread();
1165   }
1166
1167   virtual void AfterTest() OVERRIDE {}
1168
1169   virtual void DidRecreateOutputSurface(bool succeeded) OVERRIDE {
1170     EXPECT_TRUE(succeeded);
1171     EndTest();
1172   }
1173
1174  private:
1175   FakeContentLayerClient client_;
1176 };
1177
1178 MULTI_THREAD_TEST_F(LayerTreeHostContextTestImplSidePainting);
1179
1180 class ScrollbarLayerLostContext : public LayerTreeHostContextTest {
1181  public:
1182   ScrollbarLayerLostContext() : commits_(0) {}
1183
1184   virtual void BeginTest() OVERRIDE {
1185     scoped_refptr<Layer> scroll_layer = Layer::Create();
1186     scrollbar_layer_ = FakeScrollbarLayer::Create(
1187         false, true, scroll_layer->id());
1188     scrollbar_layer_->SetBounds(gfx::Size(10, 100));
1189     layer_tree_host()->root_layer()->AddChild(scrollbar_layer_);
1190     layer_tree_host()->root_layer()->AddChild(scroll_layer);
1191     PostSetNeedsCommitToMainThread();
1192   }
1193
1194   virtual void AfterTest() OVERRIDE {}
1195
1196   virtual void CommitCompleteOnThread(LayerTreeHostImpl* impl) OVERRIDE {
1197     LayerTreeHostContextTest::CommitCompleteOnThread(impl);
1198
1199     ++commits_;
1200     size_t upload_count = scrollbar_layer_->last_update_full_upload_size() +
1201         scrollbar_layer_->last_update_partial_upload_size();
1202     switch (commits_) {
1203       case 1:
1204         // First (regular) update, we should upload 2 resources (thumb, and
1205         // backtrack).
1206         EXPECT_EQ(1, scrollbar_layer_->update_count());
1207         EXPECT_EQ(2u, upload_count);
1208         LoseContext();
1209         break;
1210       case 2:
1211         // Second update, after the lost context, we should still upload 2
1212         // resources even if the contents haven't changed.
1213         EXPECT_EQ(2, scrollbar_layer_->update_count());
1214         EXPECT_EQ(2u, upload_count);
1215         EndTest();
1216         break;
1217       default:
1218         NOTREACHED();
1219     }
1220   }
1221
1222  private:
1223   int commits_;
1224   scoped_refptr<FakeScrollbarLayer> scrollbar_layer_;
1225 };
1226
1227 SINGLE_AND_MULTI_THREAD_TEST_F(ScrollbarLayerLostContext);
1228
1229 }  // namespace
1230 }  // namespace cc