Change GuestViewInternalCreateGuestFunction to create the guest view using the

extensions/browser/extension_host.cc

Index: extensions/browser/extension_host.cc
diff --git a/extensions/browser/extension_host.cc b/extensions/browser/extension_host.cc
index 2f0572e5330abb1ec9c2c937c011f5e162e71fc3..68515044edbe3727c795ef9ed41b824a3b92ab72 100644
--- a/extensions/browser/extension_host.cc
+++ b/extensions/browser/extension_host.cc
@@ -362,6 +362,12 @@ void ExtensionHost::OnDecrementLazyKeepaliveCount() {
     pm->DecrementLazyKeepaliveCount(extension());
 }
 
+// ExtensionFunctionDispatcher::Delegate
+
+content::WebContents* ExtensionHost::GetAssociatedWebContents() const {
+  return host_contents();
+}
+
 // content::WebContentsObserver
 
 void ExtensionHost::RenderViewCreated(RenderViewHost* render_view_host) {
@@ -392,18 +398,22 @@ void ExtensionHost::AddNewContents(WebContents* source,
   // the case of extensions in 'spanning' incognito mode, they can mismatch.
   // We don't want to end up putting a normal tab into an incognito window, or
   // vice versa.
+  //
   // Note that we don't do this for popup windows, because we need to associate
   // those with their extension_app_id.
   if (disposition != NEW_POPUP) {
-    WebContents* associated_contents = GetAssociatedWebContents();
-    if (associated_contents &&
-        associated_contents->GetBrowserContext() ==
+    WebContents* visible_contents = GetVisibleWebContents();
+    if (visible_contents &&
+        visible_contents->GetBrowserContext() ==
             new_contents->GetBrowserContext()) {
-      WebContentsDelegate* delegate = associated_contents->GetDelegate();
+      WebContentsDelegate* delegate = visible_contents->GetDelegate();
       if (delegate) {
-        delegate->AddNewContents(
-            associated_contents, new_contents, disposition, initial_pos,
-            user_gesture, was_blocked);
+        delegate->AddNewContents(visible_contents,
+                                 new_contents,
+                                 disposition,
+                                 initial_pos,
+                                 user_gesture,
+                                 was_blocked);
         return;
       }
     }