Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc

 // Copyright (c) 2012 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 <stdint.h>
 
 #include "base/auto_reset.h"
 #include "base/callback.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 246 matching lines @@
             browser()->profile());
     base::RunLoop runloop;
     preferences->EnsureInitialized(runloop.QuitClosure());
     runloop.Run();
     return preferences;
   }
 
   std::string device_id_;
   base::ScopedTempDir fake_gallery_temp_dir_;
   int test_jpg_size_;
-  scoped_ptr<EnsureMediaDirectoriesExists> ensure_media_directories_exists_;
+  std::unique_ptr<EnsureMediaDirectoriesExists>
+      ensure_media_directories_exists_;
 };
 
 #if !defined(DISABLE_NACL)
 class MediaGalleriesPlatformAppPpapiTest
     : public MediaGalleriesPlatformAppBrowserTest {
  protected:
   void SetUpCommandLine(base::CommandLine* command_line) override {
     MediaGalleriesPlatformAppBrowserTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kEnablePepperTesting);
   }
@@ skipping 178 matching lines @@
 
   base::ListValue custom_args;
 #if defined(USE_PROPRIETARY_CODECS)
   custom_args.AppendBoolean(true);
 #else
   custom_args.AppendBoolean(false);
 #endif
   ASSERT_TRUE(RunMediaGalleriesTestWithArg("media_metadata", custom_args))
       << message_;
 }