Add more of the server-side plumbing for extension APIs. Also

chrome/browser/renderer_host/browser_render_process_host.h

Index: chrome/browser/renderer_host/browser_render_process_host.h
diff --git a/chrome/browser/renderer_host/browser_render_process_host.h b/chrome/browser/renderer_host/browser_render_process_host.h
index d6f821e68b98e0152550beb7f1d7fbe825820f5b..c6517b8e6da8336800ca68346c8a639a4d65c4ab 100644
--- a/chrome/browser/renderer_host/browser_render_process_host.h
+++ b/chrome/browser/renderer_host/browser_render_process_host.h
@@ -109,6 +109,10 @@ class BrowserRenderProcessHost : public RenderProcessHost,
   // set of scripts and listen for updates to scripts.
   void InitUserScripts();
 
+  // Initialize support for extension APIs. Send the list of registered API
+  // functions to thre renderer process.
+  void InitExtensions();
+
   // Sends the renderer process a new set of user scripts.
   void SendUserScriptsUpdate(base::SharedMemory* shared_memory);