gfx: Add FrameTime and DisplayTime classes

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index d6c503f3c1dd28dd2884fd400bb37ba99b7409d0..f4b18bd8bec6c050383793646e7b054fa544dccc 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -359,7 +359,7 @@ void SingleThreadProxy::DidLoseOutputSurfaceOnImplThread() {
 
 // Called by the legacy scheduling path (e.g. where render_widget does the
 // scheduling)
-void SingleThreadProxy::CompositeImmediately(base::TimeTicks frame_begin_time) {
+void SingleThreadProxy::CompositeImmediately(gfx::FrameTime frame_begin_time) {
   gfx::Rect device_viewport_damage_rect;
 
   LayerTreeHostImpl::FrameData frame;
@@ -411,7 +411,7 @@ void SingleThreadProxy::ForceSerializeOnSwapBuffers() {
 }
 
 bool SingleThreadProxy::CommitAndComposite(
-    base::TimeTicks frame_begin_time,
+    gfx::FrameTime frame_begin_time,
     gfx::Rect device_viewport_damage_rect,
     bool for_readback,
     LayerTreeHostImpl::FrameData* frame) {
@@ -474,7 +474,7 @@ void SingleThreadProxy::UpdateBackgroundAnimateTicking() {
 
 bool SingleThreadProxy::DoComposite(
     scoped_refptr<cc::ContextProvider> offscreen_context_provider,
-    base::TimeTicks frame_begin_time,
+    gfx::FrameTime frame_begin_time,
     gfx::Rect device_viewport_damage_rect,
     bool for_readback,
     LayerTreeHostImpl::FrameData* frame) {