Eliminate implicit conversion from scoped_refptr<T> to T*

webkit/plugins/ppapi/ppb_image_data_impl.h

Index: webkit/plugins/ppapi/ppb_image_data_impl.h
diff --git a/webkit/plugins/ppapi/ppb_image_data_impl.h b/webkit/plugins/ppapi/ppb_image_data_impl.h
index 817b238fcca0b38ff0869b22e0c9a4bfc4c768e6..58f24572ca237bd011276309fa989b7eaceccea8 100644
--- a/webkit/plugins/ppapi/ppb_image_data_impl.h
+++ b/webkit/plugins/ppapi/ppb_image_data_impl.h
@@ -6,6 +6,7 @@
 #define WEBKIT_PLUGINS_PPAPI_PPB_IMAGE_DATA_IMPL_H_
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "ppapi/c/ppb_image_data.h"
 #include "ppapi/shared_impl/ppb_image_data_shared.h"
@@ -97,7 +98,7 @@ class PPB_ImageData_Impl : public ::ppapi::Resource,
 //   image_data->mapped_canvas()->blah();  // Guaranteed valid.
 class ImageDataAutoMapper {
  public:
-  explicit ImageDataAutoMapper(PPB_ImageData_Impl* image_data)
+  explicit ImageDataAutoMapper(scoped_refptr<PPB_ImageData_Impl> image_data)
         : image_data_(image_data) {
     if (image_data_->is_mapped()) {
       is_valid_ = true;
@@ -117,7 +118,7 @@ class ImageDataAutoMapper {
   bool is_valid() const { return is_valid_; }
 
  private:
-  PPB_ImageData_Impl* image_data_;
+  scoped_refptr<PPB_ImageData_Impl> image_data_;
   bool is_valid_;
   bool needs_unmap_;