Make sure that Content Handled application can be connected multiple times.

mojo/shell/ui_application_loader_android.h

 // Copyright 2014 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_UI_APPLICATION_LOADER_ANDROID_H_
 #define MOJO_SHELL_UI_APPLICATION_LOADER_ANDROID_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "mojo/application_manager/application_loader.h"
@@ skipping 11 matching lines @@
 // requests there.
 class UIApplicationLoader : public ApplicationLoader {
  public:
   UIApplicationLoader(scoped_ptr<ApplicationLoader> real_loader,
                       shell::Context* context);
   ~UIApplicationLoader() override;
 
   // ApplicationLoader overrides:
   void Load(ApplicationManager* manager,
             const GURL& url,
+            ScopedMessagePipeHandle shell_handle,
             scoped_refptr<LoadCallbacks> callbacks) override;
   void OnApplicationError(ApplicationManager* manager,
                           const GURL& url) override;
 
  private:
   class UILoader;
 
   // These functions are exected on the background thread. They call through
   // to |background_loader_| to do the actual loading.
   // TODO: having this code take a |manager| is fragile (as ApplicationManager
   // isn't thread safe).
   void LoadOnUIThread(ApplicationManager* manager,
                       const GURL& url,
-                      ScopedMessagePipeHandle* shell_handle);
+                      ScopedMessagePipeHandle shell_handle);
   void OnApplicationErrorOnUIThread(ApplicationManager* manager,
                                     const GURL& url);
   void ShutdownOnUIThread();
 
   scoped_ptr<ApplicationLoader> loader_;
   shell::Context* context_;
 
-  // Lives on the UI thread. Trivial interface that calls through to |loader_|.
-  UILoader* ui_loader_;
-
   DISALLOW_COPY_AND_ASSIGN(UIApplicationLoader);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_UI_APPLICATION_LOADER_ANDROID_H_