Revert of Revert of Remove threading from RendererGpuVideoAcceleratorFactories

content/renderer/media/renderer_gpu_video_accelerator_factories.h

Index: content/renderer/media/renderer_gpu_video_accelerator_factories.h
diff --git a/content/renderer/media/renderer_gpu_video_accelerator_factories.h b/content/renderer/media/renderer_gpu_video_accelerator_factories.h
index f91e690a064004ee09b4459fed77d4f3e690afac..da6b09130620daf5ff9fb82e3f02b70b4ac0a60f 100644
--- a/content/renderer/media/renderer_gpu_video_accelerator_factories.h
+++ b/content/renderer/media/renderer_gpu_video_accelerator_factories.h
@@ -14,7 +14,6 @@
 #include "content/child/thread_safe_sender.h"
 #include "content/common/content_export.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
-#include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/size.h"
 
 namespace base {
@@ -31,12 +30,9 @@
 // RenderViewImpl and only has its own header to allow extraction of its
 // implementation from render_view_impl.cc which is already far too large.
 //
-// The RendererGpuVideoAcceleratorFactories can be constructed on any thread.
-// Most public methods of the class must be called from the media thread.  The
-// exceptions (which can be called from any thread, as they are internally
-// trampolined) are:
-// * CreateVideoDecodeAccelerator()
-// * ReadPixels()
+// The RendererGpuVideoAcceleratorFactories can be constructed on any thread,
+// but subsequent calls to all public methods of the class must be called from
+// the |message_loop_proxy_|, as provided during construction.
 class CONTENT_EXPORT RendererGpuVideoAcceleratorFactories
     : public media::GpuVideoAcceleratorFactories {
  public:
@@ -44,10 +40,10 @@
   // use.  Safe to call from any thread.
   RendererGpuVideoAcceleratorFactories(
       GpuChannelHost* gpu_channel_host,
+      const scoped_refptr<base::MessageLoopProxy>& message_loop_proxy,
       const scoped_refptr<ContextProviderCommandBuffer>& context_provider);
 
   // media::GpuVideoAcceleratorFactories implementation.
-  // CreateVideoDecodeAccelerator() is safe to call from any thread.
   virtual scoped_ptr<media::VideoDecodeAccelerator>
       CreateVideoDecodeAccelerator(
           media::VideoCodecProfile profile,
@@ -64,41 +60,20 @@
                                 uint32 texture_target) OVERRIDE;
   virtual void DeleteTexture(uint32 texture_id) OVERRIDE;
   virtual void WaitSyncPoint(uint32 sync_point) OVERRIDE;
-  // ReadPixels() is safe to call from any thread.
   virtual void ReadPixels(uint32 texture_id,
-                          const gfx::Size& size,
+                          const gfx::Rect& visible_rect,
                           const SkBitmap& pixels) OVERRIDE;
   virtual base::SharedMemory* CreateSharedMemory(size_t size) OVERRIDE;
   virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() OVERRIDE;
-  virtual void Abort() OVERRIDE;
-  virtual bool IsAborted() OVERRIDE;
-  scoped_refptr<RendererGpuVideoAcceleratorFactories> Clone();
 
  protected:
   friend class base::RefCountedThreadSafe<RendererGpuVideoAcceleratorFactories>;
   virtual ~RendererGpuVideoAcceleratorFactories();
 
  private:
-  RendererGpuVideoAcceleratorFactories();
-
   // Helper to get a pointer to the WebGraphicsContext3DCommandBufferImpl,
   // if it has not been lost yet.
   WebGraphicsContext3DCommandBufferImpl* GetContext3d();
-
-  // Helper for the constructor to acquire the ContentGLContext on
-  // |task_runner_|.
-  void AsyncBindContext();
-
-  // Async versions of the public methods, run on |task_runner_|.
-  // They use output parameters instead of return values and each takes
-  // a WaitableEvent* param to signal completion (except for DeleteTexture,
-  // which is fire-and-forget).
-  // AsyncCreateVideoDecodeAccelerator returns its output in the |vda_| member.
-  void AsyncCreateVideoDecodeAccelerator(
-      media::VideoCodecProfile profile,
-      media::VideoDecodeAccelerator::Client* client);
-  void AsyncReadPixels(uint32 texture_id, const gfx::Size& size);
-  void AsyncDestroyVideoDecodeAccelerator();
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   scoped_refptr<GpuChannelHost> gpu_channel_host_;
@@ -107,20 +82,6 @@
   // For sending requests to allocate shared memory in the Browser process.
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
 
-  // This event is signaled if we have been asked to Abort().
-  base::WaitableEvent aborted_waiter_;
-
-  // This event is signaled by asynchronous tasks posted to |task_runner_| to
-  // indicate their completion.
-  // e.g. AsyncCreateVideoDecodeAccelerator()/AsyncCreateTextures() etc.
-  base::WaitableEvent task_runner_async_waiter_;
-
-  // The vda returned by the CreateVideoDecodeAccelerator function.
-  scoped_ptr<media::VideoDecodeAccelerator> vda_;
-
-  // Bitmap returned by ReadPixels().
-  SkBitmap read_pixels_bitmap_;
-
   DISALLOW_COPY_AND_ASSIGN(RendererGpuVideoAcceleratorFactories);
 };