gfx: Add FrameTime and DisplayTime classes

cc/trees/thread_proxy.cc

Index: cc/trees/thread_proxy.cc
diff --git a/cc/trees/thread_proxy.cc b/cc/trees/thread_proxy.cc
index 9fe5b9e8c8e6302d09d566291aada056a04bd4cd..d6d0723af70de1a8b9a6895f723e1b513ada746e 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -689,7 +689,7 @@ void ThreadProxy::ScheduledActionSendBeginMainFrame() {
   scoped_ptr<BeginMainFrameAndCommitState> begin_main_frame_state(
       new BeginMainFrameAndCommitState);
   begin_main_frame_state->monotonic_frame_begin_time =
-      layer_tree_host_impl_->CurrentPhysicalTimeTicks();
+      layer_tree_host_impl_->CurrentFrameTimeTicks();
   begin_main_frame_state->scroll_info =
       layer_tree_host_impl_->ProcessScrollDeltas();
 
@@ -1044,7 +1044,7 @@ DrawSwapReadbackResult ThreadProxy::DrawSwapReadbackInternal(
   base::AutoReset<bool> mark_inside(&inside_draw_, true);
 
   // Advance our animations.
-  base::TimeTicks monotonic_time =
+  gfx::FrameTime monotonic_time =
       layer_tree_host_impl_->CurrentFrameTimeTicks();
   base::Time wall_clock_time = layer_tree_host_impl_->CurrentFrameTime();
 
@@ -1230,7 +1230,7 @@ DrawSwapReadbackResult ThreadProxy::ScheduledActionDrawAndReadback() {
       forced_draw, swap_requested, readback_requested);
 }
 
-void ThreadProxy::DidAnticipatedDrawTimeChange(base::TimeTicks time) {
+void ThreadProxy::DidAnticipatedDrawTimeChange(gfx::FrameTime time) {
   if (current_resource_update_controller_on_impl_thread_)
     current_resource_update_controller_on_impl_thread_->PerformMoreUpdates(
         time);
@@ -1254,8 +1254,9 @@ base::TimeDelta ThreadProxy::CommitToActivateDurationEstimate() {
       kCommitAndActivationDurationEstimationPercentile);
 }
 
-void ThreadProxy::PostBeginImplFrameDeadline(const base::Closure& closure,
-                                             base::TimeTicks deadline) {
+void ThreadProxy::PostBeginImplFrameDeadline(
+    const base::Closure& closure,
+    gfx::FrameTime deadline) {
   base::TimeDelta delta = deadline - gfx::FrameTime::Now();
   if (delta <= base::TimeDelta())
     delta = base::TimeDelta();
@@ -1499,7 +1500,7 @@ void ThreadProxy::RenewTreePriority() {
       layer_tree_host_impl_->IsCurrentlyScrolling() ||
       layer_tree_host_impl_->page_scale_animation_active();
 
-  base::TimeTicks now = layer_tree_host_impl_->CurrentPhysicalTimeTicks();
+  base::TimeTicks now = base::TimeTicks::Now();
 
   // Update expiration time if smoothness currently takes priority.
   if (smoothness_takes_priority) {