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

cc/trees/layer_tree_host_unittest_animation.cc

 // Copyright 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 "cc/trees/layer_tree_host.h"
 
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
 #include "cc/animation/scroll_offset_animation_curve.h"
 #include "cc/animation/timing_function.h"
+#include "cc/base/time_util.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/test/animation_test_common.h"
 #include "cc/test/fake_content_layer.h"
 #include "cc/test/fake_content_layer_client.h"
 #include "cc/test/layer_tree_test.h"
 #include "cc/trees/layer_tree_impl.h"
 
 namespace cc {
 namespace {
@@ skipping 475 matching lines @@
     LayerAnimationController* controller_impl =
         host_impl->active_tree()->root_layer()->children()[0]->
         layer_animation_controller();
     Animation* animation =
         controller_impl->GetAnimation(Animation::Opacity);
     if (!animation)
       return;
 
     const FloatAnimationCurve* curve =
         animation->curve()->ToFloatAnimationCurve();
-    float start_opacity = curve->GetValue(0.0);
-    float end_opacity = curve->GetValue(curve->Duration().InSecondsF());
+    float start_opacity = curve->GetValue(base::TimeDelta());
+    float end_opacity = curve->GetValue(curve->Duration());
     float linearly_interpolated_opacity =
         0.25f * end_opacity + 0.75f * start_opacity;
-    double time = curve->Duration().InSecondsF() * 0.25;
+    base::TimeDelta time = TimeUtil::Scale(curve->Duration(), 0.25f);
     // If the linear timing function associated with this animation was not
     // picked up, then the linearly interpolated opacity would be different
     // because of the default ease timing function.
     EXPECT_FLOAT_EQ(linearly_interpolated_opacity, curve->GetValue(time));
 
     EndTest();
   }
 
   void AfterTest() override {}
 
@@ skipping 671 matching lines @@
  private:
   scoped_refptr<Layer> content_;
   int num_swap_buffers_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(
     LayerTreeHostAnimationTestAddAnimationAfterAnimating);
 
 }  // namespace
 }  // namespace cc