Remove SendBeginFramesToChildren plumbing

ui/compositor/compositor_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/thread_task_runner_handle.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/test/begin_frame_args_test.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/test/context_factories_for_test.h"
 #include "ui/compositor/test/draw_waiter_for_test.h"
 
 using testing::Mock;
 using testing::_;
 
 namespace ui {
 namespace {
 
 ACTION_P2(RemoveObserver, compositor, observer) {
   compositor->RemoveBeginFrameObserver(observer);
 }
 
-class MockCompositorBeginFrameObserver : public CompositorBeginFrameObserver {
- public:
-  MOCK_METHOD1(OnSendBeginFrame, void(const cc::BeginFrameArgs&));
-};
-
 // Test fixture for tests that require a ui::Compositor with a real task
 // runner.
 class CompositorTest : public testing::Test {
  public:
   CompositorTest() {}
   ~CompositorTest() override {}
 
   void SetUp() override {
     task_runner_ = base::ThreadTaskRunnerHandle::Get();
 
@@ skipping 42 matching lines @@
     lock = compositor()->GetCompositorLock();
     EXPECT_TRUE(compositor()->IsLocked());
     task_runner()->PostDelayedTask(
         FROM_HERE, run_loop.QuitClosure(),
         base::TimeDelta::FromMilliseconds(kCompositorLockTimeoutMs));
     run_loop.Run();
     EXPECT_TRUE(compositor()->IsLocked());
   }
 }
 
-TEST_F(CompositorTest, AddAndRemoveBeginFrameObserver) {
-  cc::BeginFrameArgs args =
-    cc::CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE,
-                                       base::TimeTicks::FromInternalValue(33));
-
-  MockCompositorBeginFrameObserver test_observer;
-  MockCompositorBeginFrameObserver test_observer2;
-
-  // Add a single observer.
-  compositor()->AddBeginFrameObserver(&test_observer);
-  Mock::VerifyAndClearExpectations(&test_observer);
-
-  // When |missed_begin_frame_args_| is sent, its type is set to MISSED.
-  cc::BeginFrameArgs expected_args(args);
-  cc::BeginFrameArgs expected_missed_args(args);
-  expected_missed_args.type = cc::BeginFrameArgs::MISSED;
-
-  // Simulate to trigger new BeginFrame by using |args|.
-  EXPECT_CALL(test_observer, OnSendBeginFrame(expected_args));
-  compositor()->SendBeginFramesToChildren(args);
-  Mock::VerifyAndClearExpectations(&test_observer);
-
-  // When new observer is added, Compositor immediately calls OnSendBeginFrame
-  // with |missed_begin_frame_args_|.
-  EXPECT_CALL(test_observer2, OnSendBeginFrame(expected_missed_args));
-  compositor()->AddBeginFrameObserver(&test_observer2);
-  Mock::VerifyAndClearExpectations(&test_observer);
-  Mock::VerifyAndClearExpectations(&test_observer2);
-
-  // When |test_observer2| is removed and added again, it will be called again.
-  EXPECT_CALL(test_observer2, OnSendBeginFrame(expected_missed_args));
-  compositor()->RemoveBeginFrameObserver(&test_observer2);
-  compositor()->AddBeginFrameObserver(&test_observer2);
-  Mock::VerifyAndClearExpectations(&test_observer2);
-
-  // When all observer is removed, |missed_begin_frame_args_| is invalidated.
-  // So, it is not used for newly added observer.
-  EXPECT_CALL(test_observer2, OnSendBeginFrame(_)).Times(0);
-  compositor()->RemoveBeginFrameObserver(&test_observer);
-  compositor()->RemoveBeginFrameObserver(&test_observer2);
-  compositor()->SendBeginFramesToChildren(args);
-  compositor()->AddBeginFrameObserver(&test_observer2);
-  Mock::VerifyAndClearExpectations(&test_observer2);
-
-  compositor()->RemoveBeginFrameObserver(&test_observer2);
-}
-
-TEST_F(CompositorTest, RemoveBeginFrameObserverWhileSendingBeginFrame) {
-  cc::BeginFrameArgs args = cc::CreateBeginFrameArgsForTesting(
-      BEGINFRAME_FROM_HERE, base::TimeTicks::FromInternalValue(33));
-
-  cc::BeginFrameArgs expected_args(args);
-  cc::BeginFrameArgs expected_missed_args(args);
-  expected_missed_args.type = cc::BeginFrameArgs::MISSED;
-
-  // Add both observers, and simulate removal of |test_observer2| during
-  // BeginFrame dispatch (implicitly triggered when the observer is added).
-  MockCompositorBeginFrameObserver test_observer;
-  MockCompositorBeginFrameObserver test_observer2;
-  EXPECT_CALL(test_observer, OnSendBeginFrame(expected_args));
-  EXPECT_CALL(test_observer2, OnSendBeginFrame(expected_missed_args))
-      .WillOnce(RemoveObserver(compositor(), &test_observer2));
-
-  // When a new observer is added, Compositor immediately calls OnSendBeginFrame
-  // with |missed_begin_frame_args_|.
-  compositor()->AddBeginFrameObserver(&test_observer);
-  compositor()->SendBeginFramesToChildren(args);
-  compositor()->AddBeginFrameObserver(&test_observer2);
-  Mock::VerifyAndClearExpectations(&test_observer);
-  Mock::VerifyAndClearExpectations(&test_observer2);
-
-  // |test_observer2| was removed during the previous implicit BeginFrame
-  // dispatch, and should not get the new frame.
-  expected_args.type = cc::BeginFrameArgs::NORMAL;
-  EXPECT_CALL(test_observer, OnSendBeginFrame(expected_args));
-  EXPECT_CALL(test_observer2, OnSendBeginFrame(_)).Times(0);
-  compositor()->SendBeginFramesToChildren(args);
-  Mock::VerifyAndClearExpectations(&test_observer);
-  Mock::VerifyAndClearExpectations(&test_observer2);
-
-  // Now remove |test_observer| during explicit BeginFrame dispatch.
-  EXPECT_CALL(test_observer, OnSendBeginFrame(expected_args))
-      .WillOnce(RemoveObserver(compositor(), &test_observer));
-  EXPECT_CALL(test_observer2, OnSendBeginFrame(_)).Times(0);
-  compositor()->SendBeginFramesToChildren(args);
-  Mock::VerifyAndClearExpectations(&test_observer);
-  Mock::VerifyAndClearExpectations(&test_observer2);
-
-  // No observers should get the new frame.
-  EXPECT_CALL(test_observer, OnSendBeginFrame(_)).Times(0);
-  EXPECT_CALL(test_observer2, OnSendBeginFrame(_)).Times(0);
-  compositor()->SendBeginFramesToChildren(args);
-  Mock::VerifyAndClearExpectations(&test_observer);
-  Mock::VerifyAndClearExpectations(&test_observer2);
-
-  // Adding a new observer should not trigger a missed frame, as the
-  // previous frame had no observers.
-  EXPECT_CALL(test_observer, OnSendBeginFrame(_)).Times(0);
-  compositor()->AddBeginFrameObserver(&test_observer);
-  compositor()->RemoveBeginFrameObserver(&test_observer);
-  Mock::VerifyAndClearExpectations(&test_observer);
-}
-
 TEST_F(CompositorTest, ReleaseWidgetWithOutputSurfaceNeverCreated) {
   compositor()->SetVisible(false);
   EXPECT_EQ(gfx::kNullAcceleratedWidget,
             compositor()->ReleaseAcceleratedWidget());
   compositor()->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
   compositor()->SetVisible(true);
 }
 
 TEST_F(CompositorTest, CreateAndReleaseOutputSurface) {
   scoped_ptr<Layer> root_layer(new Layer(ui::LAYER_SOLID_COLOR));
   root_layer->SetBounds(gfx::Rect(10, 10));
   compositor()->SetRootLayer(root_layer.get());
   compositor()->SetScaleAndSize(1.0f, gfx::Size(10, 10));
   DCHECK(compositor()->IsVisible());
   compositor()->ScheduleDraw();
   DrawWaiterForTest::WaitForCompositingEnded(compositor());
   compositor()->SetVisible(false);
   EXPECT_EQ(gfx::kNullAcceleratedWidget,
             compositor()->ReleaseAcceleratedWidget());
   compositor()->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
   compositor()->SetVisible(true);
   compositor()->ScheduleDraw();
   DrawWaiterForTest::WaitForCompositingEnded(compositor());
   compositor()->SetRootLayer(nullptr);
 }
 
 }  // namespace ui