Partial swaps on OSX

content/browser/renderer_host/accelerated_surface_container_manager_mac.h

 // Copyright (c) 2011 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_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MANAGER_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MANAGER_MAC_H_
 #pragma once
 
 #include <OpenGL/OpenGL.h>
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/synchronization/lock.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/surface/transport_dib.h"
 
+namespace gfx {
+class Rect;
+}
+
 namespace webkit {
 namespace npapi {
 struct WebPluginGeometry;
 }
 }
 
 class AcceleratedSurfaceContainerMac;
 
 // Helper class that manages the backing store and on-screen rendering
 // of instances of the GPU plugin on the Mac.
@@ skipping 45 matching lines @@
   // Draws the plugin container associated with the given id into the given
   // OpenGL context, which must already be current.
   void Draw(CGLContextObj context, gfx::PluginWindowHandle id);
 
   // Causes the next Draw call on each container to trigger a texture upload.
   // Should be called any time the drawing context has changed.
   void ForceTextureReload();
 
   // Notifies a surface that it has been painted to.
   void SetSurfaceWasPaintedTo(gfx::PluginWindowHandle id, uint64 surface_id);
+  void SetSurfaceWasPaintedTo(gfx::PluginWindowHandle id,
+                              uint64 surface_id,
+                              const gfx::Rect& update_rect);
 
   // Notifies the root container that its surface is invalid.
   void SetRootSurfaceInvalid();
 
   // Returns if a given surface should be shown.
   bool SurfaceShouldBeVisible(gfx::PluginWindowHandle id) const;
  private:
   uint32 current_id_;
 
   // Maps a "fake" plugin window handle to the corresponding container.
@@ skipping 24 matching lines @@
 
   // Both |plugin_window_to_container_map_| and the
   // AcceleratedSurfaceContainerMac in it are not threadsafe, but accessed from
   // multiple threads. All these accesses are guarded by this lock.
   mutable base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratedSurfaceContainerManagerMac);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_SURFACE_CONTAINER_MANAGER_MAC_H_