Make cross-process CALayers work on Mac

content/common/gpu/image_transport_surface_fbo_mac.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 CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_FBO_MAC_H_
 #define CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_FBO_MAC_H_
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
@@ skipping 16 matching lines @@
   class StorageProvider {
    public:
     virtual ~StorageProvider() {}
     // IOSurfaces cause too much address space fragmentation if they are
     // allocated on every resize. This gets a rounded size for allocation.
     virtual gfx::Size GetRoundedSize(gfx::Size size) = 0;
 
     // Allocate the storage for the color buffer. The specified context is
     // current, and there is a texture bound to GL_TEXTURE_RECTANGLE_ARB.
     virtual bool AllocateColorBufferStorage(
-        CGLContextObj context, gfx::Size size) = 0;
+        CGLContextObj context, GLuint texture,
+        gfx::Size size, float scale_factor) = 0;
 
     // Free the storage allocated in the AllocateColorBufferStorage call. The
     // GL texture that was bound has already been deleted by the caller.
     virtual void FreeColorBufferStorage() = 0;
 
     // Retrieve the handle for the surface to send to the browser process to
     // display.
     virtual uint64 GetSurfaceHandle() const = 0;
+
+    // Called when a frame is about to be sent to the browser process.
+    virtual void WillSwapBuffers() = 0;
   };
 
   ImageTransportSurfaceFBO(StorageProvider* storage_provider,
                            GpuChannelManager* manager,
                            GpuCommandBufferStub* stub,
                            gfx::PluginWindowHandle handle);
 
   // GLSurface implementation
   virtual bool Initialize() OVERRIDE;
   virtual void Destroy() OVERRIDE;
@@ skipping 59 matching lines @@
   std::vector<ui::LatencyInfo> latency_info_;
 
   scoped_ptr<ImageTransportHelper> helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageTransportSurfaceFBO);
 };
 
 }  // namespace content
 
 #endif  //  CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_MAC_H_