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

extensions/browser/guest_view/extensions_guest_view_manager_delegate.h

 // Copyright 2015 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_GUEST_VIEW_EXTENSIONS_GUEST_VIEW_MANAGER_DELEGATE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_EXTENSIONS_GUEST_VIEW_MANAGER_DELEGATE_H_
 
 #include "components/guest_view/browser/guest_view_manager_delegate.h"
 
 namespace content {
 class BrowserContext;
 }  // namespace content
 
 namespace extensions {
 
 // ExtensionsGuestViewManagerDelegate implements GuestViewManager functionality
 // specific to Chromium builds that include the extensions module.
 class ExtensionsGuestViewManagerDelegate
     : public guest_view::GuestViewManagerDelegate {
  public:
   explicit ExtensionsGuestViewManagerDelegate(content::BrowserContext* context);
   ~ExtensionsGuestViewManagerDelegate() override;
 
   // GuestViewManagerDelegate implementation.
   void DispatchEvent(const std::string& event_name,
-                     scoped_ptr<base::DictionaryValue> args,
+                     std::unique_ptr<base::DictionaryValue> args,
                      guest_view::GuestViewBase* guest,
                      int instance_id) override;
   bool IsGuestAvailableToContext(guest_view::GuestViewBase* guest) override;
   bool IsOwnedByExtension(guest_view::GuestViewBase* guest) override;
   void RegisterAdditionalGuestViewTypes() override;
 
  private:
   content::BrowserContext* const context_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_EXTENSIONS_GUEST_VIEW_MANAGER_DELEGATE_H_