Allow WebExternalTextureLayers to receive a bitmap along with a mailbox

webkit/renderer/compositor_bindings/web_external_texture_layer_impl.h

Index: webkit/renderer/compositor_bindings/web_external_texture_layer_impl.h
diff --git a/webkit/renderer/compositor_bindings/web_external_texture_layer_impl.h b/webkit/renderer/compositor_bindings/web_external_texture_layer_impl.h
index dfe75a64b698fc3c9991568f28a70cbf97195100..de7916fa6eba3133405be570d20b8fb4b5e91f4e 100644
--- a/webkit/renderer/compositor_bindings/web_external_texture_layer_impl.h
+++ b/webkit/renderer/compositor_bindings/web_external_texture_layer_impl.h
@@ -7,6 +7,7 @@
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "cc/layers/texture_layer_client.h"
 #include "cc/resources/texture_mailbox.h"
 #include "third_party/WebKit/public/platform/WebExternalTextureLayer.h"
@@ -20,6 +21,7 @@ struct WebExternalTextureMailbox;
 namespace webkit {
 
 class WebLayerImpl;
+class WebExternalBitmapImpl;
 
 class WebExternalTextureLayerImpl
     : public WebKit::WebExternalTextureLayer,
@@ -49,13 +51,19 @@ class WebExternalTextureLayerImpl
   virtual bool PrepareTextureMailbox(cc::TextureMailbox* mailbox) OVERRIDE;
 
  private:
-  void DidReleaseMailbox(const WebKit::WebExternalTextureMailbox& mailbox,
-                         unsigned sync_point,
-                         bool lost_resource);
+  static void DidReleaseMailbox(
+      base::WeakPtr<WebExternalTextureLayerImpl> layer,
+      const WebKit::WebExternalTextureMailbox& mailbox,
+      WebExternalBitmapImpl* bitmap,
+      unsigned sync_point,
+      bool lost_resource);
+
+  WebExternalBitmapImpl* AllocateBitmap();
 
   WebKit::WebExternalTextureLayerClient* client_;
   scoped_ptr<WebLayerImpl> layer_;
   bool uses_mailbox_;
+  ScopedVector<WebExternalBitmapImpl> free_bitmaps_;
 
   DISALLOW_COPY_AND_ASSIGN(WebExternalTextureLayerImpl);
 };