Deliver IPC messages together with SwapCompositorFrame

content/browser/android/in_process/synchronous_compositor_output_surface.h

 // Copyright 2013 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 CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
 #define CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
 
+#include <vector>
+
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/managed_memory_policy.h"
 #include "cc/output/output_surface.h"
 #include "content/public/browser/android/synchronous_compositor.h"
+#include "ipc/ipc_message.h"
 #include "ui/gfx/transform.h"
 
 namespace cc {
 class ContextProvider;
 class CompositorFrameMetadata;
 }
 
+namespace IPC {
+class Message;
+}
+
 namespace content {
 
+class FrameSwapMessageQueue;
 class SynchronousCompositorClient;
 class SynchronousCompositorOutputSurface;
 class WebGraphicsContext3DCommandBufferImpl;
 
 class SynchronousCompositorOutputSurfaceDelegate {
  public:
    virtual void DidBindOutputSurface(
       SynchronousCompositorOutputSurface* output_surface) = 0;
   virtual void DidDestroySynchronousOutputSurface(
       SynchronousCompositorOutputSurface* output_surface) = 0;
   virtual void SetContinuousInvalidate(bool enable) = 0;
   virtual void DidActivatePendingTree() = 0;
 
  protected:
   SynchronousCompositorOutputSurfaceDelegate() {}
   virtual ~SynchronousCompositorOutputSurfaceDelegate() {}
 };
 
 // Specialization of the output surface that adapts it to implement the
 // content::SynchronousCompositor public API. This class effects an "inversion
 // of control" - enabling drawing to be  orchestrated by the embedding
 // layer, instead of driven by the compositor internals - hence it holds two
 // 'client' pointers (|client_| in the OutputSurface baseclass and
 // GetDelegate()) which represent the consumers of the two roles in plays.
 // This class can be created only on the main thread, but then becomes pinned
 // to a fixed thread when BindToClient is called.
 class SynchronousCompositorOutputSurface
     : NON_EXPORTED_BASE(public cc::OutputSurface) {
  public:
-  explicit SynchronousCompositorOutputSurface(int routing_id);
+  explicit SynchronousCompositorOutputSurface(
+      int routing_id,
+      scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue);
   virtual ~SynchronousCompositorOutputSurface();
 
   // OutputSurface.
   virtual bool ForcedDrawToSoftwareDevice() const OVERRIDE;
   virtual bool BindToClient(cc::OutputSurfaceClient* surface_client) OVERRIDE;
   virtual void Reshape(const gfx::Size& size, float scale_factor) OVERRIDE;
   virtual void SetNeedsBeginFrame(bool enable) OVERRIDE;
   virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
 
   // Partial SynchronousCompositor API implementation.
   bool InitializeHwDraw(
       scoped_refptr<cc::ContextProvider> onscreen_context_provider);
   void ReleaseHwDraw();
   scoped_ptr<cc::CompositorFrame> DemandDrawHw(gfx::Size surface_size,
                                                const gfx::Transform& transform,
                                                gfx::Rect viewport,
                                                gfx::Rect clip);
   void ReturnResources(const cc::CompositorFrameAck& frame_ack);
   scoped_ptr<cc::CompositorFrame> DemandDrawSw(SkCanvas* canvas);
   void SetMemoryPolicy(const SynchronousCompositorMemoryPolicy& policy);
+  void GetMessagesToDeliver(ScopedVector<IPC::Message>* messages);
 
  private:
   class SoftwareDevice;
   friend class SoftwareDevice;
 
   void InvokeComposite(const gfx::Transform& transform,
                        gfx::Rect viewport,
                        gfx::Rect clip,
                        bool valid_for_tile_management);
   bool CalledOnValidThread() const;
   SynchronousCompositorOutputSurfaceDelegate* GetDelegate();
 
   int routing_id_;
   bool needs_begin_frame_;
   bool invoking_composite_;
 
   gfx::Transform cached_hw_transform_;
   gfx::Rect cached_hw_viewport_;
   gfx::Rect cached_hw_clip_;
 
   // Only valid (non-NULL) during a DemandDrawSw() call.
   SkCanvas* current_sw_canvas_;
 
   cc::ManagedMemoryPolicy memory_policy_;
 
   cc::OutputSurfaceClient* output_surface_client_;
   scoped_ptr<cc::CompositorFrame> frame_holder_;
 
+  scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue_;
+
   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorOutputSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_