Don't take a fake UGI every time we execute Javascript.

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 54ba0cf2a32d6da8b6b6874d701b9a2023e6153d..813c73cabdfb971a53b0ae5fd3d50f26fb402abc 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -269,6 +269,13 @@ void RenderFrameHostImpl::ExecuteJavaScript(
   javascript_callbacks_.insert(std::make_pair(key, callback));
 }
 
+void RenderFrameHostImpl::ExecuteJavaScriptForTests(
+    const base::string16& javascript) {
+  Send(new FrameMsg_JavaScriptExecuteRequestForTests(routing_id_,
+                                                     javascript,
+                                                     0, false));
+}
+
 RenderViewHost* RenderFrameHostImpl::GetRenderViewHost() {
   return render_view_host_;
 }