Convert //chrome from scoped_ptr to std::unique_ptr

chrome/app_shim/chrome_main_app_mode_mac.mm

 // Copyright 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.
 
 // On Mac, one can't make shortcuts with command-line arguments. Instead, we
 // produce small app bundles which locate the Chromium framework and load it,
 // passing the appropriate data. This is the entry point into the framework for
 // those app bundles.
 
 #import <Cocoa/Cocoa.h>
@@ skipping 123 matching lines @@
   void OnUnhideWithoutActivation();
 
   // Requests user attention.
   void OnRequestUserAttention();
   void OnSetUserAttention(apps::AppShimAttentionType attention_type);
 
   // Terminates the app shim process.
   void Close();
 
   base::FilePath user_data_dir_;
-  scoped_ptr<IPC::ChannelProxy> channel_;
+  std::unique_ptr<IPC::ChannelProxy> channel_;
   base::scoped_nsobject<AppShimDelegate> delegate_;
   bool launch_app_done_;
   bool ping_chrome_reply_received_;
   NSInteger attention_request_id_;
 
   DISALLOW_COPY_AND_ASSIGN(AppShimController);
 };
 
 AppShimController::AppShimController()
     : delegate_([[AppShimDelegate alloc] init]),
@@ skipping 545 matching lines @@
     // minute.
     main_message_loop.PostTask(
         FROM_HERE,
         base::Bind(&AppShimController::Init,
                    base::Unretained(&controller)));
   }
 
   main_message_loop.Run();
   return 0;
 }