Revert "Fix Omnibox.CharTypedToRepaintLatency regression with D3DVsync experiment"

content/browser/compositor/gpu_vsync_begin_frame_source_unittest.cc

Index: content/browser/compositor/gpu_vsync_begin_frame_source_unittest.cc
diff --git a/content/browser/compositor/gpu_vsync_begin_frame_source_unittest.cc b/content/browser/compositor/gpu_vsync_begin_frame_source_unittest.cc
deleted file mode 100644
index 75fca126f4778e4d7c45cb5626145e51a0ce1d43..0000000000000000000000000000000000000000
--- a/content/browser/compositor/gpu_vsync_begin_frame_source_unittest.cc
+++ /dev/null
@@ -1,185 +0,0 @@
-// Copyright 2017 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 "content/browser/compositor/gpu_vsync_begin_frame_source.h"
-
-#include "base/macros.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace content {
-namespace {
-
-class TestBeginFrameObserver : public cc::BeginFrameObserverBase {
- public:
-  TestBeginFrameObserver() = default;
-
-  int begin_frame_count() { return begin_frame_count_; }
-
- private:
-  bool OnBeginFrameDerivedImpl(const cc::BeginFrameArgs& args) override {
-    begin_frame_count_++;
-    return true;
-  }
-
-  void OnBeginFrameSourcePausedChanged(bool paused) override {}
-
-  int begin_frame_count_ = 0;
-
-  DISALLOW_COPY_AND_ASSIGN(TestBeginFrameObserver);
-};
-
-class TestGpuVSyncBeginFrameSource : public GpuVSyncBeginFrameSource {
- public:
-  explicit TestGpuVSyncBeginFrameSource(GpuVSyncControl* vsync_control)
-      : GpuVSyncBeginFrameSource(vsync_control) {}
-
-  void SetNow(base::TimeTicks now) { now_ = now; }
-
- private:
-  base::TimeTicks Now() const override { return now_; }
-
-  base::TimeTicks now_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestGpuVSyncBeginFrameSource);
-};
-
-class GpuVSyncBeginFrameSourceTest : public testing::Test,
-                                     public GpuVSyncControl {
- public:
-  GpuVSyncBeginFrameSourceTest() = default;
-  ~GpuVSyncBeginFrameSourceTest() override = default;
-
- protected:
-  void SetNeedsVSync(bool needs_vsync) override { needs_vsync_ = needs_vsync; }
-
-  bool needs_vsync_ = false;
-
-  DISALLOW_COPY_AND_ASSIGN(GpuVSyncBeginFrameSourceTest);
-};
-
-// Test that an observer can be added to BFS and that it receives OnBeginFrame
-// notification.
-TEST_F(GpuVSyncBeginFrameSourceTest, BasicTest) {
-  TestBeginFrameObserver observer;
-  TestGpuVSyncBeginFrameSource begin_frame_source(this);
-
-  base::TimeTicks now = base::TimeTicks() + base::TimeDelta::FromHours(2);
-  begin_frame_source.SetNow(now);
-
-  EXPECT_FALSE(needs_vsync_);
-
-  begin_frame_source.AddObserver(&observer);
-
-  EXPECT_TRUE(needs_vsync_);
-  EXPECT_FALSE(observer.LastUsedBeginFrameArgs().IsValid());
-
-  base::TimeTicks frame_time = now - base::TimeDelta::FromSeconds(1);
-  base::TimeDelta interval = base::TimeDelta::FromSeconds(2);
-
-  begin_frame_source.OnVSync(frame_time, interval);
-
-  EXPECT_EQ(1, observer.begin_frame_count());
-
-  cc::BeginFrameArgs args = observer.LastUsedBeginFrameArgs();
-  EXPECT_TRUE(args.IsValid());
-  EXPECT_EQ(frame_time, args.frame_time);
-  EXPECT_EQ(interval, args.interval);
-  EXPECT_EQ(frame_time + interval, args.deadline);
-  EXPECT_EQ(cc::BeginFrameArgs::kStartingFrameNumber + 1, args.sequence_number);
-  EXPECT_EQ(cc::BeginFrameArgs::NORMAL, args.type);
-  EXPECT_EQ(begin_frame_source.source_id(), args.source_id);
-
-  // Make sure that the deadline time is correctly advanced forward to be after
-  // 'now' when frame time is way behind.
-  now += base::TimeDelta::FromSeconds(10);
-  begin_frame_source.SetNow(now);
-  // Frame time is 5 seconds behind but the deadline should be 1 second after
-  // 'now' considering the 2 second interval.
-  frame_time = now - base::TimeDelta::FromSeconds(5);
-
-  begin_frame_source.OnVSync(frame_time, interval);
-
-  EXPECT_EQ(2, observer.begin_frame_count());
-
-  args = observer.LastUsedBeginFrameArgs();
-  EXPECT_TRUE(args.IsValid());
-  EXPECT_EQ(frame_time, args.frame_time);
-  EXPECT_EQ(interval, args.interval);
-  EXPECT_EQ(now + base::TimeDelta::FromSeconds(1), args.deadline);
-  EXPECT_EQ(cc::BeginFrameArgs::kStartingFrameNumber + 2, args.sequence_number);
-  EXPECT_EQ(cc::BeginFrameArgs::NORMAL, args.type);
-  EXPECT_EQ(begin_frame_source.source_id(), args.source_id);
-
-  begin_frame_source.RemoveObserver(&observer);
-
-  EXPECT_EQ(2, observer.begin_frame_count());
-  EXPECT_FALSE(needs_vsync_);
-}
-
-// Test that MISSED OnBeginFrame is produced as expected.
-TEST_F(GpuVSyncBeginFrameSourceTest, MissedBeginFrameArgs) {
-  TestBeginFrameObserver observer1;
-  TestBeginFrameObserver observer2;
-  TestGpuVSyncBeginFrameSource begin_frame_source(this);
-
-  base::TimeTicks now = base::TimeTicks() + base::TimeDelta::FromHours(2);
-  begin_frame_source.SetNow(now);
-
-  begin_frame_source.AddObserver(&observer1);
-
-  // The observer shouldn't be getting any BeginFrame at this point.
-  EXPECT_EQ(0, observer1.begin_frame_count());
-
-  base::TimeDelta interval = base::TimeDelta::FromSeconds(2);
-
-  // Trigger first OnBeginFrame 5 seconds behind now.
-  begin_frame_source.OnVSync(now - base::TimeDelta::FromSeconds(5), interval);
-
-  // The observer should get a NORMAL BeginFrame notification which is covered
-  // by BasicTest above.
-  EXPECT_EQ(1, observer1.begin_frame_count());
-  EXPECT_EQ(cc::BeginFrameArgs::NORMAL,
-            observer1.LastUsedBeginFrameArgs().type);
-
-  // Remove the first observer and add it back. It should get a more
-  // recent missed notification calculated from the projection of the previous
-  // notification.
-  begin_frame_source.RemoveObserver(&observer1);
-  begin_frame_source.AddObserver(&observer1);
-
-  EXPECT_EQ(2, observer1.begin_frame_count());
-
-  // The projected MISSED frame_time should be 1 second behind 'now'.
-  base::TimeTicks timestamp1 = now - base::TimeDelta::FromSeconds(1);
-  cc::BeginFrameArgs args1 = observer1.LastUsedBeginFrameArgs();
-  EXPECT_TRUE(args1.IsValid());
-  EXPECT_EQ(timestamp1, args1.frame_time);
-  EXPECT_EQ(timestamp1 + interval, args1.deadline);
-  EXPECT_EQ(cc::BeginFrameArgs::kStartingFrameNumber + 2,
-            args1.sequence_number);
-  EXPECT_EQ(cc::BeginFrameArgs::MISSED, args1.type);
-
-  // Add second observer which should receive the same notification.
-  begin_frame_source.AddObserver(&observer2);
-
-  EXPECT_EQ(1, observer2.begin_frame_count());
-
-  cc::BeginFrameArgs args2 = observer2.LastUsedBeginFrameArgs();
-  EXPECT_TRUE(args2.IsValid());
-  EXPECT_EQ(timestamp1, args2.frame_time);
-  EXPECT_EQ(timestamp1 + interval, args2.deadline);
-  EXPECT_EQ(cc::BeginFrameArgs::kStartingFrameNumber + 2,
-            args2.sequence_number);
-  EXPECT_EQ(cc::BeginFrameArgs::MISSED, args2.type);
-
-  // Adding and removing the second observer shouldn't produce any
-  // new notifications.
-  begin_frame_source.RemoveObserver(&observer2);
-  begin_frame_source.AddObserver(&observer2);
-
-  EXPECT_EQ(1, observer2.begin_frame_count());
-}
-
-}  // namespace
-}  // namespace content