Make Graphics3D::SwapBuffers take a completion callback

webkit/glue/plugins/pepper_graphics_3d.h

Index: webkit/glue/plugins/pepper_graphics_3d.h
diff --git a/webkit/glue/plugins/pepper_graphics_3d.h b/webkit/glue/plugins/pepper_graphics_3d.h
index 420a36440e0153d729509aae5b31f1c64b356fa5..dec9ab35b22f7c8ef6b90c6d6a92791b393bdc46 100644
--- a/webkit/glue/plugins/pepper_graphics_3d.h
+++ b/webkit/glue/plugins/pepper_graphics_3d.h
@@ -54,7 +54,7 @@ class Graphics3D : public Resource {
 
   bool MakeCurrent();
 
-  bool SwapBuffers();
+  bool SwapBuffers(PP_CompletionCallback callback);
 
   unsigned GetError();
 
@@ -62,6 +62,9 @@ class Graphics3D : public Resource {
 
   void SetSwapBuffersCallback(Callback0::Type* callback);
 
+  void ViewInitiatedPaint();
+  void ViewFlushedPaint();
+
   unsigned GetBackingTextureId();
 
   gpu::gles2::GLES2Implementation* impl() {
@@ -75,6 +78,10 @@ class Graphics3D : public Resource {
   // to, if any. If the context is currently unbound, this will be NULL.
   PluginInstance* bound_instance_;
 
+  // True when the page's SwapBuffers has been issued but not returned yet.
+  bool swap_initiated_;
+  PP_CompletionCallback swap_callback_;
+
   // PluginDelegate's 3D Context. Responsible for providing the command buffer.
   scoped_ptr<PluginDelegate::PlatformContext3D> platform_context_;