gfx: Add FrameTime and DisplayTime classes

ui/compositor/compositor.cc

 // Copyright (c) 2012 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 "ui/compositor/compositor.h"
 
 #include <algorithm>
 #include <deque>
 
 #include "base/bind.h"
@@ skipping 273 matching lines @@
   wait_run_loop_->Run();
   compositor->RemoveObserver(this);
 }
 
 void DrawWaiterForTest::OnCompositingDidCommit(Compositor* compositor) {
   if (wait_for_commit_)
     wait_run_loop_->Quit();
 }
 
 void DrawWaiterForTest::OnCompositingStarted(Compositor* compositor,
-                                             base::TimeTicks start_time) {
+                                             gfx::FrameTime start_time) {
 }
 
 void DrawWaiterForTest::OnCompositingEnded(Compositor* compositor) {
   if (!wait_for_commit_)
     wait_run_loop_->Quit();
 }
 
 void DrawWaiterForTest::OnCompositingAborted(Compositor* compositor) {
 }
 
@@ skipping 429 matching lines @@
 }
 
 void Compositor::DidCommit() {
   DCHECK(!IsLocked());
   FOR_EACH_OBSERVER(CompositorObserver,
                     observer_list_,
                     OnCompositingDidCommit(this));
 }
 
 void Compositor::DidCommitAndDrawFrame() {
-  base::TimeTicks start_time = gfx::FrameTime::Now();
+  gfx::FrameTime start_time = gfx::FrameTime::Now();
   FOR_EACH_OBSERVER(CompositorObserver,
                     observer_list_,
                     OnCompositingStarted(this, start_time));
 }
 
 void Compositor::DidCompleteSwapBuffers() {
   DCHECK(g_compositor_thread);
   NotifyEnd();
 }
 
@@ skipping 53 matching lines @@
     // CompositorObservers to be notified before starting another
     // draw cycle.
     ScheduleDraw();
   }
   FOR_EACH_OBSERVER(CompositorObserver,
                     observer_list_,
                     OnCompositingEnded(this));
 }
 
 }  // namespace ui