gfx: Add FrameTime and DisplayTime classes

cc/output/begin_frame_args.h

Index: cc/output/begin_frame_args.h
diff --git a/cc/output/begin_frame_args.h b/cc/output/begin_frame_args.h
index 025a4075c25e6b84ab9597dabac7e5c83b34ea1b..50f0f37491bf3b49711c04f314be8bb2e0c7bb90 100644
--- a/cc/output/begin_frame_args.h
+++ b/cc/output/begin_frame_args.h
@@ -7,6 +7,7 @@
 
 #include "base/time/time.h"
 #include "cc/base/cc_export.h"
+#include "ui/gfx/frame_time.h"
 
 namespace cc {
 
@@ -16,8 +17,8 @@ struct CC_EXPORT BeginFrameArgs {
 
   // You should be able to find all instances where a BeginFrame has been
   // created by searching for "BeginFrameArgs::Create".
-  static BeginFrameArgs Create(base::TimeTicks frame_time,
-                               base::TimeTicks deadline,
+  static BeginFrameArgs Create(gfx::FrameTime frame_time,
+                               gfx::FrameTime deadline,
                                base::TimeDelta interval);
   static BeginFrameArgs CreateForSynchronousCompositor();
   static BeginFrameArgs CreateForTesting();
@@ -39,13 +40,13 @@ struct CC_EXPORT BeginFrameArgs {
 
   bool IsValid() const { return interval >= base::TimeDelta(); }
 
-  base::TimeTicks frame_time;
-  base::TimeTicks deadline;
+  gfx::FrameTime frame_time;
+  gfx::FrameTime deadline;
   base::TimeDelta interval;
 
  private:
-  BeginFrameArgs(base::TimeTicks frame_time,
-                 base::TimeTicks deadline,
+  BeginFrameArgs(gfx::FrameTime frame_time,
+                 gfx::FrameTime deadline,
                  base::TimeDelta interval);
 };