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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 28a872ef78202b0087fa0a49be6249372d093734..44d796e8cfb1043bca9ea0a94767284eab023c61 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -774,6 +774,8 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_CSSInsertRequest, OnCSSInsertRequest)
     IPC_MESSAGE_HANDLER(FrameMsg_JavaScriptExecuteRequest,
                         OnJavaScriptExecuteRequest)
+    IPC_MESSAGE_HANDLER(FrameMsg_JavaScriptExecuteRequestForTests,
+                        OnJavaScriptExecuteRequestForTests)
     IPC_MESSAGE_HANDLER(FrameMsg_SetEditableSelectionOffsets,
                         OnSetEditableSelectionOffsets)
     IPC_MESSAGE_HANDLER(FrameMsg_SetupTransitionView, OnSetupTransitionView)
@@ -1231,6 +1233,29 @@ void RenderFrameImpl::OnJavaScriptExecuteRequest(
   v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
   v8::Handle<v8::Value> result =
       frame_->executeScriptAndReturnValue(WebScriptSource(jscript));
+
+  HandleJavascriptExecutionResult(jscript, id, notify_result, result);
+}
+
+void RenderFrameImpl::OnJavaScriptExecuteRequestForTests(
+    const base::string16& jscript,
+    int id,
+    bool notify_result) {
+  TRACE_EVENT_INSTANT0("test_tracing", "OnJavaScriptExecuteRequestForTests",
+                       TRACE_EVENT_SCOPE_THREAD);
+
+  v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
+  v8::Handle<v8::Value> result =
+      frame_->executeScriptAndReturnValueForTests(WebScriptSource(jscript));
+
+  HandleJavascriptExecutionResult(jscript, id, notify_result, result);
+}
+
+void RenderFrameImpl::HandleJavascriptExecutionResult(
+    const base::string16& jscript,
+    int id,
+    bool notify_result,
+    v8::Handle<v8::Value> result) {
   if (notify_result) {
     base::ListValue list;
     if (!result.IsEmpty()) {