Serve mojo WebUI resources from the same origin as the WebUI itself.

chrome/browser/ui/webui/mojo_web_ui_controller.h

Index: chrome/browser/ui/webui/mojo_web_ui_controller.h
diff --git a/chrome/browser/ui/webui/mojo_web_ui_controller.h b/chrome/browser/ui/webui/mojo_web_ui_controller.h
index d29705ea62bebc6c76e84575d81c85801d4e601c..9b2e7cc55569a4e3c7e3ffd80031a12ca952e569 100644
--- a/chrome/browser/ui/webui/mojo_web_ui_controller.h
+++ b/chrome/browser/ui/webui/mojo_web_ui_controller.h
@@ -30,10 +30,6 @@ class MojoWebUIControllerBase : public content::WebUIController {
   // WebUIController overrides:
   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
 
- protected:
-  // Invoke to register mapping between binding file and resource id (IDR_...).
-  void AddMojoResourcePath(const std::string& path, int resource_id);
-
  private:
   // Bindings files are registered here.
   content::WebUIDataSource* mojo_data_source_;