Allow transitions to WebUI pages which are extension urls (new tab page is the relevant example).

content/public/renderer/content_renderer_client.h

 // Copyright (c) 2012 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_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 
 #include <string>
 
 #include "base/string16.h"
 #include "base/memory/weak_ptr.h"
 #include "ipc/ipc_message.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/page_transition_types.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageVisibilityState.h"
 #include "v8/include/v8.h"
 
 class FilePath;
 class GURL;
 class SkBitmap;
 
 namespace WebKit {
 class WebAudioSourceProvider;
 class WebFrame;
@@ skipping 107 matching lines @@
 
   // Returns true if we should fork a new process for the given navigation.
   virtual bool ShouldFork(WebKit::WebFrame* frame,
                           const GURL& url,
                           bool is_initial_navigation,
                           bool* send_referrer);
 
   // 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,
+                               content::PageTransition transition_type,

[jam, 2012/08/07 16:17:01]

nit: content:: is redundant

[Cris Neckar, 2012/08/07 18:45:53]

Done.

                                const GURL& url,
                                GURL* new_url);
 
   // 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.
   virtual bool ShouldPumpEventsDuringCookieMessage();
 
   // See the corresponding functions in WebKit::WebFrameClient.
   virtual void DidCreateScriptContext(WebKit::WebFrame* frame,
                                       v8::Handle<v8::Context> context,
@@ skipping 26 matching lines @@
                                       const GURL& first_party_for_cookies,
                                       const std::string& value);
 
   virtual void RegisterPPAPIInterfaceFactories(
       webkit::ppapi::PpapiInterfaceFactoryManager* factory_manager) {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_