Fork cc::OutputSurface into cc::CompositorFrameSink.

cc/proto/commit_earlyout_reason.proto

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package cc.proto;
 
 message CommitEarlyOutReason {
   enum Reason {
-    ABORTED_OUTPUT_SURFACE_LOST = 1;
+    ABORTED_COMPOSITOR_FRAME_SINK_LOST = 1;
     ABORTED_NOT_VISIBLE = 2;
     ABORTED_DEFERRED_COMMIT = 3;
     FINISHED_NO_UPDATES = 4;
   }
 
   optional Reason reason = 1;
-}
+}