Keep normal popups opened from same-origin iframes in an extension process.

content/renderer/content_renderer_client.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #pragma once
 
 #include <string>
 
@@ skipping 57 matching lines @@
   // all widgets are hidden.
   virtual bool RunIdleHandlerWhenWidgetsHidden() = 0;
 
   // Returns true if the given url can create popup windows.
   virtual bool AllowPopup(const GURL& creator) = 0;
 
   // Returns true if we should fork a new process for the given navigation.
   virtual bool ShouldFork(WebKit::WebFrame* frame,
                           const GURL& url,
                           bool is_content_initiated,
+                          bool is_initial_navigation,
                           bool* send_referrer) = 0;
 
   // Notifies the embedder that the given frame is requesting the resource at
   // |url|.  If the function returns true, the url is changed to |new_url|.
   virtual bool WillSendRequest(WebKit::WebFrame* frame,
                                const GURL& url,
                                GURL* new_url) = 0;
 
   // Whether to pump events when sending sync cookie messages.  Needed if the
   // embedder can potentiall put up a modal dialog on the UI thread as a result.
@@ skipping 10 matching lines @@
   virtual bool IsLinkVisited(unsigned long long link_hash) = 0;
   virtual void PrefetchHostName(const char* hostname, size_t length) = 0;
   virtual bool ShouldOverridePageVisibilityState(
       const RenderView* render_view,
       WebKit::WebPageVisibilityState* override_state) const = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_CONTENT_RENDERER_CLIENT_H_