If a RemoteFrame asks to navigate, send an OpenURL IPC

content/renderer/render_frame_proxy.h

Index: content/renderer/render_frame_proxy.h
diff --git a/content/renderer/render_frame_proxy.h b/content/renderer/render_frame_proxy.h
index 8761f5e40900d1e29425a896798ef16dc80fd3b9..a50dd9aca297738448150c3796703afe38b66ca1 100644
--- a/content/renderer/render_frame_proxy.h
+++ b/content/renderer/render_frame_proxy.h
@@ -99,6 +99,9 @@ class CONTENT_EXPORT RenderFrameProxy
       blink::WebRemoteFrame* targetFrame,
       blink::WebSecurityOrigin target,
       blink::WebDOMMessageEvent event);
+  virtual void navigate(blink::WebRemoteFrame* frame,
+                        const blink::WebURLRequest& request,
+                        bool should_replace_current_entry);
 
  private:
   RenderFrameProxy(int routing_id, int frame_routing_id);