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

chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h

 // Copyright (c) 2013 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_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_
 
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/memory/ref_counted.h"
@@ skipping 74 matching lines @@
       const CreateSnapshotFileSuccessCallback& success_callback,
       const ErrorCallback& error_callback) = 0;
 
   // Platform-specific implementations that are streaming don't create a local
   // snapshot file. Blobs are instead FileSystemURL backed and read in a stream.
   virtual bool IsStreaming() = 0;
 
   // Reads up to |buf_len| bytes from |device_file_path| into |buf|. Invokes the
   // appropriate callback asynchronously when complete. Only valid when
   // IsStreaming() is true.
-  virtual void ReadBytes(
-      const base::FilePath& device_file_path,
-      net::IOBuffer* buf, int64 offset, int buf_len,
-      const ReadBytesSuccessCallback& success_callback,
-      const ErrorCallback& error_callback) = 0;
+  virtual void ReadBytes(const base::FilePath& device_file_path,
+                         const scoped_refptr<net::IOBuffer>& buf,
+                         int64 offset,
+                         int buf_len,
+                         const ReadBytesSuccessCallback& success_callback,
+                         const ErrorCallback& error_callback) = 0;
 
   // Called when the
   // (1) Browser application is in shutdown mode (or)
   // (2) Last extension using this MTP device is destroyed (or)
   // (3) Attached MTP device is removed (or)
   // (4) User revoked the MTP device gallery permission.
   // Ownership of |MTPDeviceAsyncDelegate| is handed off to the delegate
   // implementation class by this call. This function should take care of
   // cancelling all the pending tasks before deleting itself.
   virtual void CancelPendingTasksAndDeleteDelegate() = 0;
 
  protected:
   // Always destruct this object via CancelPendingTasksAndDeleteDelegate().
   virtual ~MTPDeviceAsyncDelegate() {}
 };
 
 typedef base::Callback<void(MTPDeviceAsyncDelegate*)>
     CreateMTPDeviceAsyncDelegateCallback;
 
 void CreateMTPDeviceAsyncDelegate(
     const base::FilePath::StringType& device_location,
     const CreateMTPDeviceAsyncDelegateCallback& callback);
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_