cc: Remove the capability to give up and leave compositing mode.

cc/trees/thread_proxy.h

 // Copyright 2011 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.
 
 #ifndef CC_TREES_THREAD_PROXY_H_
 #define CC_TREES_THREAD_PROXY_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 128 matching lines @@
 
   // Called on main thread.
   void SetRendererCapabilitiesMainThreadCopy(
       const RendererCapabilities& capabilities);
   void BeginMainFrame(
       scoped_ptr<BeginMainFrameAndCommitState> begin_main_frame_state);
   void DidCommitAndDrawFrame();
   void DidCompleteSwapBuffers();
   void SetAnimationEvents(scoped_ptr<AnimationEventsVector> queue);
   void DoCreateAndInitializeOutputSurface();
-  // |capabilities| is set only when |success| is true.
-  void OnOutputSurfaceInitializeAttempted(
-      bool success,
-      const RendererCapabilities& capabilities);
   void SendCommitRequestToImplThreadIfNeeded();
 
   // Called on impl thread.
   struct ReadbackRequest;
   struct CommitPendingRequest;
   struct SchedulerStateRequest;
 
   void ForceCommitForReadbackOnImplThread(
       CompletionEvent* begin_main_frame_sent_completion,
       ReadbackRequest* request);
@@ skipping 138 matching lines @@
 
   base::WeakPtr<ThreadProxy> main_thread_weak_ptr_;
   base::WeakPtr<ThreadProxy> impl_thread_weak_ptr_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadProxy);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_THREAD_PROXY_H_