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

mojo/shell/capability_filter_test.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.
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/shell/application_loader.h"
 #include "mojo/shell/application_manager.h"
@@ skipping 10 matching lines @@
 // This class models an application who will use the shell to interact with a
 // system service. The shell may limit this application's visibility of the full
 // set of interfaces exposed by that service.
 class TestApplication : public ApplicationDelegate {
  public:
   TestApplication();
   ~TestApplication() 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;
 
   void ConnectionClosed(const std::string& service_url);
 
-  ApplicationImpl* app_;
+  Shell* shell_;
+  std::string url_;
   ValidatorPtr validator_;
   scoped_ptr<ApplicationConnection> connection1_;
   scoped_ptr<ApplicationConnection> connection2_;
 
   DISALLOW_COPY_AND_ASSIGN(TestApplication);
 };
 
 class TestLoader : public ApplicationLoader {
  public:
   explicit TestLoader(ApplicationDelegate* delegate);
@@ skipping 53 matching lines @@
   base::MessageLoop loop_;
   scoped_ptr<ApplicationManager> application_manager_;
   ConnectionValidator* validator_;
 
   DISALLOW_COPY_AND_ASSIGN(CapabilityFilterTest);
 };
 
 }  // namespace test
 }  // namespace shell
 }  // namespace mojo