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

content/public/browser/render_process_host.h

Index: content/public/browser/render_process_host.h
diff --git a/content/public/browser/render_process_host.h b/content/public/browser/render_process_host.h
index ee650367fccb1cd2dcfc0f4a26ecc0e8ab6dd14f..b33a5b325dc7c4e9d45dd04d59be60d050cfb4a7 100644
--- a/content/public/browser/render_process_host.h
+++ b/content/public/browser/render_process_host.h
@@ -27,6 +27,7 @@ class BrowserContext;
 class BrowserMessageFilter;
 class RenderProcessHostObserver;
 class RenderWidgetHost;
+class ServiceRegistry;
 class StoragePartition;
 struct GlobalRequestID;
 
@@ -232,6 +233,9 @@ class CONTENT_EXPORT RenderProcessHost : public IPC::Sender,
   // have changed.
   virtual void NotifyTimezoneChange() = 0;
 
+  // Returns the ServiceRegistry for this process.
+  virtual ServiceRegistry* GetServiceRegistry() = 0;
+
   // Static management functions -----------------------------------------------
 
   // Flag to run the renderer in process.  This is primarily