cc: Measure compositor timing with finer granularity

cc/scheduler/scheduler_unittest.cc

Index: cc/scheduler/scheduler_unittest.cc
diff --git a/cc/scheduler/scheduler_unittest.cc b/cc/scheduler/scheduler_unittest.cc
index beeb767badaadc238728e9d2f94146be6c352ff3..5b72632b73731a896fa953a6059f2692960e6f89 100644
--- a/cc/scheduler/scheduler_unittest.cc
+++ b/cc/scheduler/scheduler_unittest.cc
@@ -127,7 +127,10 @@ class FakeSchedulerClient : public SchedulerClient {
     PushAction("ScheduledActionDrawAndSwapForced");
     return DRAW_SUCCESS;
   }
-  void ScheduledActionCommit() override { PushAction("ScheduledActionCommit"); }
+  void ScheduledActionCommit() override {
+    PushAction("ScheduledActionCommit");
+    scheduler_->DidCommit();
+  }
   void ScheduledActionActivateSyncTree() override {
     PushAction("ScheduledActionActivateSyncTree");
   }
@@ -136,6 +139,8 @@ class FakeSchedulerClient : public SchedulerClient {
   }
   void ScheduledActionPrepareTiles() override {
     PushAction("ScheduledActionPrepareTiles");
+    scheduler_->WillPrepareTiles();
+    scheduler_->DidPrepareTiles();
   }
   void ScheduledActionInvalidateOutputSurface() override {
     actions_.push_back("ScheduledActionInvalidateOutputSurface");
@@ -454,8 +459,9 @@ TEST_F(SchedulerTest, SendBeginFramesToChildrenDeadlineNotAdjusted) {
       base::TimeDelta::FromMilliseconds(1));
   fake_compositor_timing_history_->SetBeginMainFrameToCommitDurationEstimate(
       base::TimeDelta::FromMilliseconds(2));
-  fake_compositor_timing_history_->SetCommitToActivateDurationEstimate(
-      base::TimeDelta::FromMilliseconds(4));
+  fake_compositor_timing_history_
+      ->SetPrepareTilesBeginToReadyToActivateDurationEstimate(
+          base::TimeDelta::FromMilliseconds(4));
 
   EXPECT_FALSE(client_->needs_begin_frames());
   scheduler_->SetChildrenNeedBeginFrames(true);
@@ -710,8 +716,6 @@ class SchedulerClientThatsetNeedsDrawInsideDraw : public FakeSchedulerClient {
   SchedulerClientThatsetNeedsDrawInsideDraw()
       : FakeSchedulerClient(), request_redraws_(false) {}
 
-  void ScheduledActionSendBeginMainFrame() override {}
-
   void SetRequestRedrawsInsideDraw(bool enable) { request_redraws_ = enable; }
 
   DrawResult ScheduledActionDrawAndSwapIfPossible() override {
@@ -727,8 +731,6 @@ class SchedulerClientThatsetNeedsDrawInsideDraw : public FakeSchedulerClient {
     return DRAW_SUCCESS;
   }
 
-  void ScheduledActionCommit() override {}
-
  private:
   bool request_redraws_;
 };
@@ -823,7 +825,6 @@ class SchedulerClientThatSetNeedsCommitInsideDraw : public FakeSchedulerClient {
   SchedulerClientThatSetNeedsCommitInsideDraw()
       : set_needs_commit_on_next_draw_(false) {}
 
-  void ScheduledActionSendBeginMainFrame() override {}
   DrawResult ScheduledActionDrawAndSwapIfPossible() override {
     // Only SetNeedsCommit the first time this is called
     if (set_needs_commit_on_next_draw_) {
@@ -838,8 +839,6 @@ class SchedulerClientThatSetNeedsCommitInsideDraw : public FakeSchedulerClient {
     return DRAW_SUCCESS;
   }
 
-  void ScheduledActionCommit() override {}
-
   void SetNeedsCommitOnNextDraw() { set_needs_commit_on_next_draw_ = true; }
 
  private:
@@ -1091,6 +1090,7 @@ TEST_F(SchedulerTest, PrepareTilesOncePerFrame) {
   EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
 
   EXPECT_TRUE(scheduler_->PrepareTilesPending());
+  scheduler_->WillPrepareTiles();
   scheduler_->DidPrepareTiles();  // An explicit PrepareTiles.
   EXPECT_FALSE(scheduler_->PrepareTilesPending());
 
@@ -1122,10 +1122,10 @@ TEST_F(SchedulerTest, PrepareTilesOncePerFrame) {
   EXPECT_FALSE(scheduler_->RedrawPending());
   EXPECT_FALSE(scheduler_->PrepareTilesPending());
   EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());
-  scheduler_->DidPrepareTiles();  // Corresponds to ScheduledActionPrepareTiles
 
   // If we get another DidPrepareTiles within the same frame, we should
   // not PrepareTiles on the next frame.
+  scheduler_->WillPrepareTiles();
   scheduler_->DidPrepareTiles();  // An explicit PrepareTiles.
   scheduler_->SetNeedsPrepareTiles();
   scheduler_->SetNeedsRedraw();
@@ -1149,6 +1149,7 @@ TEST_F(SchedulerTest, PrepareTilesOncePerFrame) {
   // frame. This verifies we don't alternate calling PrepareTiles once and
   // twice.
   EXPECT_TRUE(scheduler_->PrepareTilesPending());
+  scheduler_->WillPrepareTiles();
   scheduler_->DidPrepareTiles();  // An explicit PrepareTiles.
   EXPECT_FALSE(scheduler_->PrepareTilesPending());
   scheduler_->SetNeedsPrepareTiles();
@@ -1188,7 +1189,6 @@ TEST_F(SchedulerTest, PrepareTilesOncePerFrame) {
   EXPECT_FALSE(scheduler_->RedrawPending());
   EXPECT_FALSE(scheduler_->PrepareTilesPending());
   EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());
-  scheduler_->DidPrepareTiles();  // Corresponds to ScheduledActionPrepareTiles
 }
 
 TEST_F(SchedulerTest, TriggerBeginFrameDeadlineEarly) {
@@ -1302,8 +1302,9 @@ void SchedulerTest::MainFrameInHighLatencyMode(
   fake_compositor_timing_history_->SetBeginMainFrameToCommitDurationEstimate(
       base::TimeDelta::FromMilliseconds(
           begin_main_frame_to_commit_estimate_in_ms));
-  fake_compositor_timing_history_->SetCommitToActivateDurationEstimate(
-      base::TimeDelta::FromMilliseconds(commit_to_activate_estimate_in_ms));
+  fake_compositor_timing_history_
+      ->SetPrepareTilesBeginToReadyToActivateDurationEstimate(
+          base::TimeDelta::FromMilliseconds(commit_to_activate_estimate_in_ms));
 
   scheduler_->SetImplLatencyTakesPriority(impl_latency_takes_priority);
 
@@ -1374,8 +1375,9 @@ TEST_F(
       base::TimeDelta::FromMilliseconds(1));
   fake_compositor_timing_history_->SetBeginMainFrameToCommitDurationEstimate(
       base::TimeDelta::FromMilliseconds(32));
-  fake_compositor_timing_history_->SetCommitToActivateDurationEstimate(
-      base::TimeDelta::FromMilliseconds(32));
+  fake_compositor_timing_history_
+      ->SetPrepareTilesBeginToReadyToActivateDurationEstimate(
+          base::TimeDelta::FromMilliseconds(32));
 
   // Disables automatic swap acks so this test can force swap ack throttling
   // to simulate a blocked Browser ui thread.
@@ -1454,8 +1456,9 @@ TEST_F(SchedulerTest,
       base::TimeDelta::FromMilliseconds(1));
   fake_compositor_timing_history_->SetBeginMainFrameToCommitDurationEstimate(
       base::TimeDelta::FromMilliseconds(32));
-  fake_compositor_timing_history_->SetCommitToActivateDurationEstimate(
-      base::TimeDelta::FromMilliseconds(32));
+  fake_compositor_timing_history_
+      ->SetPrepareTilesBeginToReadyToActivateDurationEstimate(
+          base::TimeDelta::FromMilliseconds(32));
 
   // Disables automatic swap acks so this test can force swap ack throttling
   // to simulate a blocked Browser ui thread.
@@ -1542,8 +1545,9 @@ TEST_F(
       base::TimeDelta::FromMilliseconds(1));
   fake_compositor_timing_history_->SetBeginMainFrameToCommitDurationEstimate(
       base::TimeDelta::FromMilliseconds(32));
-  fake_compositor_timing_history_->SetCommitToActivateDurationEstimate(
-      base::TimeDelta::FromMilliseconds(32));
+  fake_compositor_timing_history_
+      ->SetPrepareTilesBeginToReadyToActivateDurationEstimate(
+          base::TimeDelta::FromMilliseconds(32));
 
   // Disables automatic swap acks so this test can force swap ack throttling
   // to simulate a blocked Browser ui thread.
@@ -2852,11 +2856,6 @@ class SchedulerClientSetNeedsPrepareTilesOnDraw : public FakeSchedulerClient {
     scheduler_->SetNeedsPrepareTiles();
     return FakeSchedulerClient::ScheduledActionDrawAndSwapIfPossible();
   }
-
-  void ScheduledActionPrepareTiles() override {
-    FakeSchedulerClient::ScheduledActionPrepareTiles();
-    scheduler_->DidPrepareTiles();
-  }
 };
 
 TEST_F(SchedulerTest, SynchronousCompositorPrepareTilesOnDraw) {