Adds plumbing to pass WebUI mojo::Handle from browser to renderer

content/renderer/mojo/mojo_render_process_observer.h

Index: content/renderer/mojo/mojo_render_process_observer.h
diff --git a/content/renderer/mojo/mojo_render_process_observer.h b/content/renderer/mojo/mojo_render_process_observer.h
index 95f1b7053d373f9c32509aa2974a8a06e9777d07..c3649c51c2a733c3c54302bc104a06979e62d3cc 100644
--- a/content/renderer/mojo/mojo_render_process_observer.h
+++ b/content/renderer/mojo/mojo_render_process_observer.h
@@ -6,8 +6,10 @@
 #define CONTENT_RENDERER_MOJO_MOJO_RENDER_PROCESS_OBSERVER_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "content/common/mojo/render_process.mojom.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "ipc/ipc_platform_file.h"
+#include "mojo/public/bindings/remote_ptr.h"
 
 namespace mojo {
 namespace embedder{
@@ -23,7 +25,9 @@ class RenderThread;
 // RenderProcessObserver implementation that initializes the mojo channel when
 // the right IPC is seen.
 // MojoRenderProcessObserver deletes itself when the RenderProcess is shutdown.
-class MojoRenderProcessObserver : public content::RenderProcessObserver {
+class MojoRenderProcessObserver
+    : public content::RenderProcessObserver,
+      public RenderProcessMojo {
  public:
   MojoRenderProcessObserver(RenderThread* render_thread);
 
@@ -36,10 +40,17 @@ class MojoRenderProcessObserver : public content::RenderProcessObserver {
 
   void OnChannelCreated(const IPC::PlatformFileForTransit& file);
 
+  // RenderProcessMojo overrides:
+  virtual void SetWebUIHandle(
+      int32 view_routing_id,
+      mojo::ScopedMessagePipeHandle web_ui_handle) OVERRIDE;
+
   content::RenderThread* render_thread_;
 
   scoped_ptr<MojoChannelInit> channel_init_;
 
+  mojo::RemotePtr<content::RenderProcessHostMojo> render_process_host_mojo_;
+
   DISALLOW_COPY_AND_ASSIGN(MojoRenderProcessObserver);
 };