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

mojo/shell/shell_application_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 MOJO_SHELL_SHELL_APPLICATION_DELEGATE_H_
 #define MOJO_SHELL_SHELL_APPLICATION_DELEGATE_H_
 
 #include "mojo/shell/public/cpp/application_delegate.h"
 
 #include <stdint.h>
@@ skipping 10 matching lines @@
 class ShellApplicationDelegate
     : public ApplicationDelegate,
       public InterfaceFactory<mojom::ApplicationManager>,
       public mojom::ApplicationManager {
  public:
   explicit ShellApplicationDelegate(mojo::shell::ApplicationManager* manager);
   ~ShellApplicationDelegate() override;
 
  private:
   // Overridden from ApplicationDelegate:
-  void Initialize(ApplicationImpl* app) override;
+  void Initialize(Shell* shell, const std::string& url, uint32_t id) override;
   bool AcceptConnection(ApplicationConnection* connection) override;
 
   // Overridden from InterfaceFactory<mojom::ApplicationManager>:
   void Create(
       ApplicationConnection* connection,
       InterfaceRequest<mojom::ApplicationManager> request) override;
 
   // Overridden from mojom::ApplicationManager:
   void CreateInstanceForHandle(
       ScopedHandle channel,
       const String& url,
       mojom::CapabilityFilterPtr filter,
       InterfaceRequest<mojom::PIDReceiver> pid_receiver) override;
   void AddListener(
       mojom::ApplicationManagerListenerPtr listener) override;
 
   mojo::shell::ApplicationManager* manager_;
 
   WeakBindingSet<mojom::ApplicationManager> bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellApplicationDelegate);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_SHELL_APPLICATION_DELEGATE_H_