Extract shell methods from ApplicationImpl into a base class, and pass this to Initialize() instead.

components/devtools_service/devtools_service_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 COMPONENTS_DEVTOOLS_SERVICE_DEVTOOLS_SERVICE_DELEGATE_H_
 #define COMPONENTS_DEVTOOLS_SERVICE_DEVTOOLS_SERVICE_DELEGATE_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/devtools_service/public/interfaces/devtools_service.mojom.h"
 #include "mojo/shell/public/cpp/application_delegate.h"
 #include "mojo/shell/public/cpp/interface_factory.h"
 
 namespace devtools_service {
 
 class DevToolsService;
 
 class DevToolsServiceDelegate
     : public mojo::ApplicationDelegate,
       public mojo::InterfaceFactory<DevToolsRegistry>,
       public mojo::InterfaceFactory<DevToolsCoordinator> {
  public:
   DevToolsServiceDelegate();
   ~DevToolsServiceDelegate() override;
 
  private:
   // mojo::ApplicationDelegate implementation.
-  void Initialize(mojo::ApplicationImpl* app) override;
+  void Initialize(mojo::Shell* shell, const std::string& url,
+                  uint32_t id) override;
   bool AcceptConnection(
       mojo::ApplicationConnection* connection) override;
   void Quit() override;
 
   // mojo::InterfaceFactory<DevToolsRegistry> implementation.
   void Create(mojo::ApplicationConnection* connection,
               mojo::InterfaceRequest<DevToolsRegistry> request) override;
 
   // mojo::InterfaceFactory<DevToolsCoordinator> implementation.
   void Create(mojo::ApplicationConnection* connection,
               mojo::InterfaceRequest<DevToolsCoordinator> request) override;
 
   scoped_ptr<DevToolsService> service_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsServiceDelegate);
 };
 
 }  // namespace devtools_service
 
 #endif  // COMPONENTS_DEVTOOLS_SERVICE_DEVTOOLS_SERVICE_DELEGATE_H_