Add an UpdateContext call to WebPluginDelegateImpl on the Mac.

webkit/glue/plugins/webplugin_delegate_impl.h

Index: webkit/glue/plugins/webplugin_delegate_impl.h
diff --git a/webkit/glue/plugins/webplugin_delegate_impl.h b/webkit/glue/plugins/webplugin_delegate_impl.h
index 408a710f4faf70427ab74dbdf336e4fc885ab35b..4cbf9c10924f6b9e4ce1642f3e0ca1dc2f78868e 100644
--- a/webkit/glue/plugins/webplugin_delegate_impl.h
+++ b/webkit/glue/plugins/webplugin_delegate_impl.h
@@ -88,6 +88,12 @@ class WebPluginDelegateImpl : public WebPluginDelegate {
   virtual const gfx::Rect& GetClipRect() const { return clip_rect_; }
   virtual int GetQuirks() const { return quirks_; }
 
+#if defined(OS_MACOSX)
+  // Informs the delegate that the context used for painting windowless plugins
+  // has changed.
+  virtual void UpdateContext(gfx::NativeDrawingContext context);
+#endif
+
  private:
   friend class DeleteTask<WebPluginDelegateImpl>;