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

components/font_service/font_service_app.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_FONT_SERVICE_FONT_SERVICE_APP_H_
 #define COMPONENTS_FONT_SERVICE_FONT_SERVICE_APP_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "components/font_service/public/interfaces/font_service.mojom.h"
 #include "mojo/common/weak_binding_set.h"
 #include "mojo/services/tracing/public/cpp/tracing_impl.h"
 #include "mojo/shell/public/cpp/application_delegate.h"
 #include "mojo/shell/public/cpp/interface_factory.h"
 #include "skia/ext/skia_utils_base.h"
 
 namespace font_service {
 
 class FontServiceApp : public mojo::ApplicationDelegate,
                        public mojo::InterfaceFactory<FontService>,
                        public FontService {
  public:
   FontServiceApp();
   ~FontServiceApp() override;
 
  private:
   // ApplicationDelegate:
-  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;
 
   // mojo::InterfaceFactory<FontService>:
   void Create(mojo::ApplicationConnection* connection,
               mojo::InterfaceRequest<FontService> request) override;
 
   // FontService:
   void MatchFamilyName(const mojo::String& family_name,
                        TypefaceStyle requested_style,
@@ skipping 10 matching lines @@
   // We don't want to leak paths to our callers; we thus enumerate the paths of
   // fonts.
   SkTDArray<SkString*> paths_;
 
   DISALLOW_COPY_AND_ASSIGN(FontServiceApp);
 };
 
 }  // namespace font_service
 
 #endif  // COMPONENTS_FONT_SERVICE_FONT_SERVICE_APP_H_