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

content/public/renderer/content_renderer_client.cc

Index: content/public/renderer/content_renderer_client.cc
===================================================================
--- content/public/renderer/content_renderer_client.cc	(revision 149870)
+++ content/public/renderer/content_renderer_client.cc	(working copy)
@@ -63,9 +63,11 @@
   return false;
 }
 
-bool ContentRendererClient::WillSendRequest(WebKit::WebFrame* frame,
-                                            const GURL& url,
-                                            GURL* new_url) {
+bool ContentRendererClient::WillSendRequest(
+    WebKit::WebFrame* frame,
+    content::PageTransition transition_type,
+    const GURL& url,
+    GURL* new_url) {
   return false;
 }