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

extensions/browser/app_window/app_window_contents.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_CONTENTS_H_
 #define EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_CONTENTS_H_
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "extensions/browser/app_window/app_window.h"
 #include "url/gurl.h"
 
 namespace content {
 class BrowserContext;
 class RenderFrameHost;
 }
 
 namespace extensions {
@@ skipping 24 matching lines @@
  private:
   // content::WebContentsObserver
   bool OnMessageReceived(const IPC::Message& message) override;
   void ReadyToCommitNavigation(content::NavigationHandle* handle) override;
 
   void UpdateDraggableRegions(const std::vector<DraggableRegion>& regions);
   void SuspendRenderFrameHost(content::RenderFrameHost* rfh);
 
   AppWindow* host_;  // This class is owned by |host_|
   GURL url_;
-  scoped_ptr<content::WebContents> web_contents_;
+  std::unique_ptr<content::WebContents> web_contents_;
   bool is_blocking_requests_;
   bool is_window_ready_;
 
   DISALLOW_COPY_AND_ASSIGN(AppWindowContentsImpl);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_APP_WINDOW_APP_WINDOW_CONTENTS_H_