cc: Get rid of SurfaceDestroyed and use SurfaceDiscarded instead

cc/surfaces/display.h

 // Copyright 2014 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_SURFACES_DISPLAY_H_
 #define CC_SURFACES_DISPLAY_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 73 matching lines @@
   void DidReceiveSwapBuffersAck() override;
   void DidReceiveTextureInUseResponses(
       const gpu::TextureInUseResponses& responses) override;
 
   // SurfaceObserver implementation.
   void OnSurfaceDamaged(const SurfaceId& surface,
                         const BeginFrameAck& ack,
                         bool* changed) override;
   void OnSurfaceCreated(const SurfaceInfo& surface_info) override;
   void OnSurfaceDiscarded(const SurfaceId& surface_id) override;
-  void OnSurfaceDestroyed(const SurfaceId& surface_id) override;
   void OnSurfaceDamageExpected(const SurfaceId& surface_id,
                                const BeginFrameArgs& args) override;
 
   bool has_scheduler() const { return !!scheduler_; }
   DirectRenderer* renderer_for_testing() const { return renderer_.get(); }
 
   void ForceImmediateDrawAndSwapIfPossible();
 
  private:
   void InitializeRenderer();
@@ skipping 28 matching lines @@
   SoftwareRenderer* software_renderer_ = nullptr;
   std::vector<ui::LatencyInfo> stored_latency_info_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_DISPLAY_H_