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

ui/compositor/transform_animation_curve_adapter_unittest.cc

Index: ui/compositor/transform_animation_curve_adapter_unittest.cc
diff --git a/ui/compositor/transform_animation_curve_adapter_unittest.cc b/ui/compositor/transform_animation_curve_adapter_unittest.cc
index b68e862689143a6a2bd5e435295682b9b5b3ca2a..10ee66811f318b9a5585849c5065c7316ef447cc 100644
--- a/ui/compositor/transform_animation_curve_adapter_unittest.cc
+++ b/ui/compositor/transform_animation_curve_adapter_unittest.cc
@@ -7,6 +7,7 @@
 #include <sstream>
 
 #include "base/time/time.h"
+#include "cc/base/time_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/compositor/test/test_utils.h"
 
@@ -41,13 +42,12 @@ TEST(InverseTransformCurveAdapterTest, InversesTransform) {
   static const int kSteps = 1000;
   double step = 1.0 / kSteps;
   for (int i = 0; i <= kSteps ; ++i) {
+    base::TimeDelta time_step = cc::TimeUtil::Scale(duration, i * step);
     std::ostringstream message;
     message << "Step " << i << " of " << kSteps;
     SCOPED_TRACE(message.str());
-    gfx::Transform progress_parent_transform =
-            parent_curve.GetValue(i*step);
-    gfx::Transform progress_child_transform =
-            child_curve.GetValue(i*step);
+    gfx::Transform progress_parent_transform = parent_curve.GetValue(time_step);
+    gfx::Transform progress_child_transform = child_curve.GetValue(time_step);
     CheckApproximatelyEqual(effective_child_transform,
                             progress_parent_transform *
                             progress_child_transform);