Support exposing Mojo services between render frames, render threads, and their respective hosts.

content/public/browser/render_frame_host.h

 // Copyright 2013 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 CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "ui/gfx/native_widget_types.h"
 #include "url/gurl.h"
 
 namespace base {
 class Value;
 }
 
 namespace content {
 class RenderProcessHost;
 class RenderViewHost;
+class ServiceRegistry;
 class SiteInstance;
 
 // The interface provides a communication conduit with a frame in the renderer.
 class CONTENT_EXPORT RenderFrameHost : public IPC::Listener,
                                        public IPC::Sender {
  public:
   // Returns the RenderFrameHost given its ID and the ID of its render process.
   // Returns NULL if the IDs do not correspond to a live RenderFrameHost.
   static RenderFrameHost* FromID(int render_process_id, int render_frame_id);
 
@@ skipping 33 matching lines @@
   // Runs some JavaScript in this frame's context. If a callback is provided, it
   // will be used to return the result, when the result is available.
   typedef base::Callback<void(const base::Value*)> JavaScriptResultCallback;
   virtual void ExecuteJavaScript(const base::string16& javascript) = 0;
   virtual void ExecuteJavaScript(const base::string16& javascript,
                                  const JavaScriptResultCallback& callback) = 0;
 
   // Temporary until we get rid of RenderViewHost.
   virtual RenderViewHost* GetRenderViewHost() = 0;
 
+  // Returns the ServiceRegistry for this frame.
+  virtual ServiceRegistry* GetServiceRegistry() = 0;
+
  private:
   // This interface should only be implemented inside content.
   friend class RenderFrameHostImpl;
   RenderFrameHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_