Change GuestViewInternalCreateGuestFunction to create the guest view using the

extensions/browser/extension_function.cc

Index: extensions/browser/extension_function.cc
diff --git a/extensions/browser/extension_function.cc b/extensions/browser/extension_function.cc
index 773f027bac20c4e618c1b17cd5bfc24ab791f035..aec46e69316c384a4a8923ba8ee9ef8de1205f71 100644
--- a/extensions/browser/extension_function.cc
+++ b/extensions/browser/extension_function.cc
@@ -375,11 +375,13 @@ void UIThreadExtensionFunction::SetRenderFrameHost(
 }
 
 content::WebContents* UIThreadExtensionFunction::GetAssociatedWebContents() {
-  content::WebContents* web_contents = NULL;
-  if (dispatcher())
-    web_contents = dispatcher()->delegate()->GetAssociatedWebContents();
+  return dispatcher() ? dispatcher()->delegate()->GetAssociatedWebContents()
+                      : NULL;
+}
 
-  return web_contents;
+content::WebContents* UIThreadExtensionFunction::GetVisibleWebContents() {
+  return dispatcher() ? dispatcher()->delegate()->GetVisibleWebContents()
+                      : NULL;
 }
 
 void UIThreadExtensionFunction::SendResponse(bool success) {