Media gallery fixups for scoped_refptr<T> operator T* removal.

chrome/utility/media_galleries/image_metadata_extractor.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_UTILITY_MEDIA_GALLERIES_IMAGE_METADATA_EXTRACTOR_H_
 #define CHROME_UTILITY_MEDIA_GALLERIES_IMAGE_METADATA_EXTRACTOR_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
+#include "base/memory/ref_counted.h"
 
 namespace media {
 class DataSource;
 }
 
 namespace net {
 class DrainableIOBuffer;
 }
 
 namespace metadata {
@@ skipping 35 matching lines @@
   const std::string& camera_model() const;
   double exposure_time_sec() const;
   bool flash_fired() const;
   double f_number() const;
   double focal_length_mm() const;
   int iso_equivalent() const;
 
  private:
   // Second half of the Extract method.
   void FinishExtraction(const DoneCallback& callback,
-                        net::DrainableIOBuffer* buffer);
+                        const scoped_refptr<net::DrainableIOBuffer>& buffer);
 
   bool extracted_;
 
   int width_;
   int height_;
 
   int rotation_;
 
   double x_resolution_;
   double y_resolution_;
 
   std::string date_;
 
   std::string camera_make_;
   std::string camera_model_;
   double exposure_time_sec_;
   bool flash_fired_;
   double f_number_;
   double focal_length_mm_;
   int iso_equivalent_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageMetadataExtractor);
 };
 
 }  // namespace metadata
 
 #endif  // CHROME_UTILITY_MEDIA_GALLERIES_IMAGE_METADATA_EXTRACTOR_H_