gfx: Add FrameTime and DisplayTime classes

cc/animation/scrollbar_animation_controller_thinning_unittest.cc

Index: cc/animation/scrollbar_animation_controller_thinning_unittest.cc
diff --git a/cc/animation/scrollbar_animation_controller_thinning_unittest.cc b/cc/animation/scrollbar_animation_controller_thinning_unittest.cc
index 7bb507614ef733d5d72c21fd992897267425ef75..d838a2f7cf188de9f92fe808c8e184b7e96c5c66 100644
--- a/cc/animation/scrollbar_animation_controller_thinning_unittest.cc
+++ b/cc/animation/scrollbar_animation_controller_thinning_unittest.cc
@@ -8,6 +8,7 @@
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/frame_time.h"
 
 namespace cc {
 namespace {
@@ -44,13 +45,13 @@ class ScrollbarAnimationControllerThinningTest : public testing::Test {
 };
 
 TEST_F(ScrollbarAnimationControllerThinningTest, Idle) {
-  scrollbar_controller_->Animate(base::TimeTicks());
+  scrollbar_controller_->Animate(gfx::FrameTime());
   EXPECT_FLOAT_EQ(0.7f, scrollbar_layer_->opacity());
   EXPECT_FLOAT_EQ(0.4f, scrollbar_layer_->thumb_thickness_scale_factor());
 }
 
 TEST_F(ScrollbarAnimationControllerThinningTest, AwakenByScrollGesture) {
-  base::TimeTicks time;
+  gfx::FrameTime time;
   time += base::TimeDelta::FromSeconds(1);
   scrollbar_controller_->DidScrollGestureBegin();
   EXPECT_FALSE(scrollbar_controller_->IsAnimating());
@@ -118,7 +119,7 @@ TEST_F(ScrollbarAnimationControllerThinningTest, AwakenByScrollGesture) {
 }
 
 TEST_F(ScrollbarAnimationControllerThinningTest, AwakenByProgrammaticScroll) {
-  base::TimeTicks time;
+  gfx::FrameTime time;
   time += base::TimeDelta::FromSeconds(1);
   EXPECT_TRUE(scrollbar_controller_->DidScrollUpdate(time));
   EXPECT_TRUE(scrollbar_controller_->IsAnimating());
@@ -182,7 +183,7 @@ TEST_F(ScrollbarAnimationControllerThinningTest, AwakenByProgrammaticScroll) {
 }
 
 TEST_F(ScrollbarAnimationControllerThinningTest, MouseOverAndOut) {
-  base::TimeTicks time;
+  gfx::FrameTime time;
   time += base::TimeDelta::FromSeconds(1);
   EXPECT_TRUE(scrollbar_controller_->DidScrollUpdate(time));
   EXPECT_TRUE(scrollbar_controller_->IsAnimating());