Remove gfx::FrameTime for a single clock source

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index cc239da773142f736fc473b1ea41ef43fec1eb96..91042a24248acfe195496a32d6215067d9cc421e 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -65,7 +65,7 @@
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkMallocPixelRef.h"
-#include "ui/gfx/frame_time.h"
+
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/geometry/vector2d_conversions.h"
@@ -1649,7 +1649,7 @@ class LayerTreeHostImplTestScrollbarAnimation : public LayerTreeHostImplTest {
 
     SetupLayers(settings);
 
-    base::TimeTicks fake_now = gfx::FrameTime::Now();
+    base::TimeTicks fake_now = base::TimeTicks::Now();
 
     EXPECT_FALSE(did_request_animate_);
     EXPECT_FALSE(did_request_redraw_);
@@ -6841,7 +6841,7 @@ TEST_F(LayerTreeHostImplWithTopControlsTest, TopControlsAnimationAtOrigin) {
 
   // The top controls should properly animate until finished, despite the scroll
   // offset being at the origin.
-  base::TimeTicks animation_time = gfx::FrameTime::Now();
+  base::TimeTicks animation_time = base::TimeTicks::Now();
   while (did_request_animate_) {
     did_request_redraw_ = false;
     did_request_animate_ = false;
@@ -6911,7 +6911,7 @@ TEST_F(LayerTreeHostImplWithTopControlsTest, TopControlsAnimationAfterScroll) {
   EXPECT_FALSE(did_request_commit_);
 
   // Animate the top controls to the limit.
-  base::TimeTicks animation_time = gfx::FrameTime::Now();
+  base::TimeTicks animation_time = base::TimeTicks::Now();
   while (did_request_animate_) {
     did_request_redraw_ = false;
     did_request_animate_ = false;
@@ -6975,7 +6975,7 @@ TEST_F(LayerTreeHostImplWithTopControlsTest,
   EXPECT_FALSE(did_request_commit_);
 
   // Animate the top controls to the limit.
-  base::TimeTicks animation_time = gfx::FrameTime::Now();
+  base::TimeTicks animation_time = base::TimeTicks::Now();
   while (did_request_animate_) {
     did_request_redraw_ = false;
     did_request_animate_ = false;