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

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index b554511c13d7140f2730d168aab4ab12c184e2cc..092b63045b22a00e10b5564a999ea9c70c424ac1 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -14,6 +14,7 @@
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
+#include "content/common/mojo/service_registry_impl.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/common/javascript_message_type.h"
 #include "content/public/common/page_transition_types.h"
@@ -66,6 +67,7 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost {
       const base::string16& javascript,
       const JavaScriptResultCallback& callback) OVERRIDE;
   virtual RenderViewHost* GetRenderViewHost() OVERRIDE;
+  virtual ServiceRegistry* GetServiceRegistry() OVERRIDE;
 
   // IPC::Sender
   virtual bool Send(IPC::Message* msg) OVERRIDE;
@@ -302,6 +304,8 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost {
   // When the last BeforeUnload message was sent.
   base::TimeTicks send_before_unload_start_time_;
 
+  ServiceRegistryImpl service_registry_;
+
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);