cc: Track BeginMainFrame more precisely in CompositorTimingHistory.

cc/test/layer_tree_test.cc

Index: cc/test/layer_tree_test.cc
diff --git a/cc/test/layer_tree_test.cc b/cc/test/layer_tree_test.cc
index 8207c4aee407d149847b71899bee06103274cd82..7a20230fe573455967fdb9d54f8a39a4d3259022 100644
--- a/cc/test/layer_tree_test.cc
+++ b/cc/test/layer_tree_test.cc
@@ -213,8 +213,10 @@ class ThreadProxyForTest : public ThreadProxy {
     test_hooks_->SetDeferCommitsOnImpl(defer_commits);
   }
 
-  void BeginMainFrameAbortedOnImpl(CommitEarlyOutReason reason) override {
-    ThreadProxy::BeginMainFrameAbortedOnImpl(reason);
+  void BeginMainFrameAbortedOnImpl(
+      CommitEarlyOutReason reason,
+      base::TimeTicks main_thread_start_time) override {
+    ThreadProxy::BeginMainFrameAbortedOnImpl(reason, main_thread_start_time);
     test_hooks_->BeginMainFrameAbortedOnImpl(reason);
   }
 
@@ -248,8 +250,9 @@ class ThreadProxyForTest : public ThreadProxy {
     test_hooks_->FinishGLOnImpl();
   }
 
-  void StartCommitOnImpl(CompletionEvent* completion) override {
-    ThreadProxy::StartCommitOnImpl(completion);
+  void StartCommitOnImpl(CompletionEvent* completion,
+                         base::TimeTicks main_thread_start_time) override {
+    ThreadProxy::StartCommitOnImpl(completion, main_thread_start_time);
     test_hooks_->StartCommitOnImpl();
   }