Make Keyframe use TimeTicks/TimeDelta to represent time instead of double.

cc/test/layer_tree_test.cc

 // Copyright 2011 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 "cc/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_registrar.h"
 #include "cc/animation/layer_animation_controller.h"
@@ skipping 506 matching lines @@
   main_task_runner_->PostDelayedTask(
       FROM_HERE,
       base::Bind(&LayerTreeTest::EndTest, main_thread_weak_ptr_),
       base::TimeDelta::FromMilliseconds(delay_milliseconds));
 }
 
 void LayerTreeTest::PostAddAnimationToMainThread(
     Layer* layer_to_receive_animation) {
   main_task_runner_->PostTask(
       FROM_HERE,
-      base::Bind(&LayerTreeTest::DispatchAddAnimation,
-                 main_thread_weak_ptr_,
-                 base::Unretained(layer_to_receive_animation),
-                 0.000001));
+      base::Bind(&LayerTreeTest::DispatchAddAnimation, main_thread_weak_ptr_,
+                 base::Unretained(layer_to_receive_animation), 0.000004));
 }
 
 void LayerTreeTest::PostAddInstantAnimationToMainThread(
     Layer* layer_to_receive_animation) {
   main_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&LayerTreeTest::DispatchAddAnimation,
                  main_thread_weak_ptr_,
                  base::Unretained(layer_to_receive_animation),
                  0.0));
@@ skipping 281 matching lines @@
   return -1;
 }
 
 void LayerTreeTest::DestroyLayerTreeHost() {
   if (layer_tree_host_ && layer_tree_host_->root_layer())
     layer_tree_host_->root_layer()->SetLayerTreeHost(NULL);
   layer_tree_host_ = nullptr;
 }
 
 }  // namespace cc