gfx: Add FrameTime and DisplayTime classes

cc/output/output_surface.cc

Index: cc/output/output_surface.cc
diff --git a/cc/output/output_surface.cc b/cc/output/output_surface.cc
index 002a44a37eb3f2a5f3ceaa437d959f006402321b..1ae5fe12596a8ee68b3bd6604ba0063fb25ddcb2 100644
--- a/cc/output/output_surface.cc
+++ b/cc/output/output_surface.cc
@@ -97,7 +97,7 @@ void OutputSurface::InitializeBeginImplFrameEmulation(
     base::TimeDelta interval) {
   if (throttle_frame_production) {
     scoped_refptr<DelayBasedTimeSource> time_source;
-    if (gfx::FrameTime::TimestampsAreHighRes())
+    if (gfx::FrameTime::IsHighRes())
       time_source = DelayBasedTimeSourceHighRes::Create(interval, task_runner);
     else
       time_source = DelayBasedTimeSource::Create(interval, task_runner);
@@ -179,10 +179,10 @@ void OutputSurface::BeginImplFrame(const BeginFrameArgs& args) {
   }
 }
 
-base::TimeTicks OutputSurface::RetroactiveBeginImplFrameDeadline() {
+gfx::FrameTime OutputSurface::RetroactiveBeginImplFrameDeadline() {
   // TODO(brianderson): Remove the alternative deadline once we have better
   // deadline estimations.
-  base::TimeTicks alternative_deadline =
+  gfx::FrameTime alternative_deadline =
       skipped_begin_impl_frame_args_.frame_time +
       BeginFrameArgs::DefaultRetroactiveBeginFramePeriod();
   return std::max(skipped_begin_impl_frame_args_.deadline,