Formalize a RenderFrameHost::AddMessageToConsole() API.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index d6abcbbfa10a5605dedbdb59b600fba978dad436..18bf1e4efdb28d908a4dfd3faeab328959cddc2b 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -265,6 +265,11 @@ gfx::NativeView RenderFrameHostImpl::GetNativeView() {
   return view->GetNativeView();
 }
 
+void RenderFrameHostImpl::AddMessageToConsole(ConsoleMessageLevel level,
+                                              const std::string& message) {
+  Send(new FrameMsg_AddMessageToConsole(routing_id_, level, message));
+}
+
 void RenderFrameHostImpl::ExecuteJavaScript(
     const base::string16& javascript) {
   Send(new FrameMsg_JavaScriptExecuteRequest(routing_id_,