Remove implicit conversions from scoped_refptr to T* in chrome/browser/media_galleries/

chrome/browser/media_galleries/media_scan_manager_unittest.cc

 // 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.
 
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 171 matching lines @@
     find_folders_results_ = results;
   }
 
   void SetExpectedScanResults(int gallery_count,
                                const MediaGalleryScanResult& file_counts) {
     expected_gallery_count_ = gallery_count;
     expected_file_counts_ = file_counts;
   }
 
   void StartScan() {
-    media_scan_manager_->StartScan(profile_.get(), extension_,
-                                   true /* user_gesture */);
+    media_scan_manager_->StartScan(
+        profile_.get(), extension_.get(), true /* user_gesture */);
   }
 
   MediaGalleriesPreferences* gallery_prefs() {
     return gallery_prefs_;
   }
 
   const MediaGalleriesPrefInfoMap& known_galleries() const {
     return gallery_prefs_->known_galleries();
   }
 
@@ skipping 523 matching lines @@
   file_counts.audio_count *= kGalleriesAdded;
   file_counts.image_count *= kGalleriesAdded;
   file_counts.video_count *= kGalleriesAdded;
   SetExpectedScanResults(kGalleriesAdded, file_counts);
   StartScan();
 
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(1, FindFolderDestroyCount());
   EXPECT_EQ(galleries_before + kGalleriesAdded, gallery_count());
 }