Replace Chrome IPC with Mojo IPC for querying BatteryStatus service

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index a25fd444d474711a694dac994eea0273572ccd12..537c59baad4380416234b629524dd7594e2fbd57 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -252,9 +252,6 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // immediately after receiving response headers.
   void ResumeResponseDeferredAtStart(const GlobalRequestID& request_id);
 
-  // Activates Mojo for this process. Does nothing if Mojo is already activated.
-  void EnsureMojoActivated();
-
  protected:
   // A proxy for our IPC::Channel that lives on the IO thread (see
   // browser_process.h)
@@ -279,7 +276,6 @@ class CONTENT_EXPORT RenderProcessHostImpl
  private:
   friend class VisitRelayingRenderProcessHost;
 
-  void MaybeActivateMojo();
   bool ShouldUseMojoChannel() const;
   scoped_ptr<IPC::ChannelProxy> CreateChannelProxy(
       const std::string& channel_id);
@@ -287,6 +283,9 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // Creates and adds the IO thread message filters.
   void CreateMessageFilters();
 
+  // Registers Mojo services to be exposed to the renderer.
+  void RegisterMojoServices();
+
   // Control message handlers.
   void OnShutdownRequest();
   void OnDumpHandlesDone();
@@ -327,7 +326,6 @@ class CONTENT_EXPORT RenderProcessHostImpl
 #endif
 
   scoped_ptr<MojoApplicationHost> mojo_application_host_;
-  bool mojo_activation_required_;
 
   // The registered IPC listener objects. When this list is empty, we should
   // delete ourselves.