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

content/public/common/page_transition_types.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_COMMON_PAGE_TRANSITION_TYPES_H_
 #define CONTENT_PUBLIC_COMMON_PAGE_TRANSITION_TYPES_H_
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 
@@ skipping 131 matching lines @@
 // Returns true if the given transition is a top-level frame transition, or
 // false if the transition was for a subframe.
 CONTENT_EXPORT bool PageTransitionIsMainFrame(PageTransition type);
 
 // Returns whether a transition involves a redirection
 CONTENT_EXPORT bool PageTransitionIsRedirect(PageTransition type);
 
 // Return the qualifier
 CONTENT_EXPORT int32 PageTransitionGetQualifier(PageTransition type);
 
+// Returns true if the transition can be triggered by the web instead of
+// through UI or similar.
+CONTENT_EXPORT bool PageTransitionIsWebTriggerable(PageTransition type);
+
 // Return a string version of the core type values.
 CONTENT_EXPORT const char* PageTransitionGetCoreTransitionString(
     PageTransition type);
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_PAGE_TRANSITION_TYPES_H_