Eliminate implicit conversion from scoped_refptr<T> to T*

webkit/plugins/ppapi/ppb_graphics_2d_impl.h

Index: webkit/plugins/ppapi/ppb_graphics_2d_impl.h
diff --git a/webkit/plugins/ppapi/ppb_graphics_2d_impl.h b/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
index bfe530d1c223d1d8dfb1fd3222fe21e8200af259..99ab356220cbdecb8d74e9e54bd1a0e3ef3a6a11 100644
--- a/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
+++ b/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/ppb_graphics_2d.h"
@@ -114,13 +115,13 @@ class PPB_Graphics2D_Impl : public ::ppapi::Resource,
   // rect argument will be filled by each function with the area affected by
   // the update that requires invalidation. If there were no pixels changed,
   // this rect can be untouched.
-  void ExecutePaintImageData(PPB_ImageData_Impl* image,
+  void ExecutePaintImageData(scoped_refptr<PPB_ImageData_Impl> image,
                              int x, int y,
                              const gfx::Rect& src_rect,
                              gfx::Rect* invalidated_rect);
   void ExecuteScroll(const gfx::Rect& clip, int dx, int dy,
                      gfx::Rect* invalidated_rect);
-  void ExecuteReplaceContents(PPB_ImageData_Impl* image,
+  void ExecuteReplaceContents(scoped_refptr<PPB_ImageData_Impl> image,
                               gfx::Rect* invalidated_rect);
 
   // Schedules the offscreen callback to be fired at a future time. This