Pass responsibility for IOSurface-texture reuse to the gpu process.

cc/output/output_surface.h

 // Copyright 2012 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_OUTPUT_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_OUTPUT_SURFACE_H_
 
 #include <deque>
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/overlay_candidate_validator.h"
 #include "cc/output/software_output_device.h"
 #include "cc/output/vulkan_context_provider.h"
+#include "gpu/command_buffer/common/texture_in_use_response.h"
 
 namespace base { class SingleThreadTaskRunner; }
 
 namespace ui {
 class LatencyInfo;
 }
 
 namespace gfx {
 class Rect;
 class Size;
@@ skipping 100 matching lines @@
   virtual void BindFramebuffer();
 
   // The implementation may destroy or steal the contents of the CompositorFrame
   // passed in (though it will not take ownership of the CompositorFrame
   // itself). For successful swaps, the implementation must call
   // OutputSurfaceClient::DidSwapBuffers() and eventually
   // DidSwapBuffersComplete().
   virtual void SwapBuffers(CompositorFrame* frame) = 0;
   virtual void OnSwapBuffersComplete();
 
+  // Called by subclasses after receiving a response from the gpu process to a
+  // query about whether a given set of textures is still in use by the OS
+  // compositor.
+  void DidReceiveTextureInUseResponses(
+      const gpu::TextureInUseResponses& responses);
+
   bool HasClient() { return !!client_; }
 
   // Get the class capable of informing cc of hardware overlay capability.
   virtual OverlayCandidateValidator* GetOverlayCandidateValidator() const;
 
   // Returns true if a main image overlay plane should be scheduled.
   virtual bool IsDisplayedAsOverlayPlane() const;
 
   // Get the texture for the main image's overlay.
   virtual unsigned GetOverlayTextureId() const;
@@ skipping 42 matching lines @@
   bool external_stencil_test_enabled_ = false;
 
   base::WeakPtrFactory<OutputSurface> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_