First cut at "content handling" support in Mojo.

mojo/service_manager/background_shell_service_loader.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_SERVICE_MANAGER_BACKGROUND_SHELL_SERVICE_LOADER_H_
 #define MOJO_SERVICE_MANAGER_BACKGROUND_SHELL_SERVICE_LOADER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/simple_thread.h"
 #include "mojo/service_manager/service_loader.h"
 
 namespace mojo {
 
 // TODO(tim): Eventually this should be Android-only to support services
 // that we need to bundle with the shell (such as NetworkService). Perhaps
 // we should move it to shell/ as well.
 class MOJO_SERVICE_MANAGER_EXPORT BackgroundShellServiceLoader :
     public ServiceLoader,
     public base::DelegateSimpleThread::Delegate {
  public:
   BackgroundShellServiceLoader(scoped_ptr<ServiceLoader> real_loader,
                                const std::string& thread_name,
                                base::MessageLoop::Type message_loop_type);
   virtual ~BackgroundShellServiceLoader();
 
   // ServiceLoader overrides:
-  virtual void LoadService(ServiceManager* manager,
-                           const GURL& url,
-                           ScopedMessagePipeHandle shell_handle) OVERRIDE;
+  virtual void LoadService(
+      ServiceManager* manager,
+      const GURL& url,
+      scoped_refptr<LoadServiceCallbacks> callbacks) OVERRIDE;
   virtual void OnServiceError(ServiceManager* manager,
                               const GURL& url) OVERRIDE;
 
   // Post a task to quit the MessageLoop we are running for the app when we
   // are destroyed. Most apps should quit themselves and not need this.
   // TODO(tim): Remove this method once applications are smart enough
   // to quit themselves. Bug 394477.
   void set_quit_on_shutdown() { quit_on_shutdown_ = true; }
 
  private:
@@ skipping 32 matching lines @@
 
   // Lives on |thread_|. Trivial interface that calls through to |loader_|.
   BackgroundLoader* background_loader_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundShellServiceLoader);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICE_MANAGER_BACKGROUND_SHELL_SERVICE_LOADER_H_