Add GetPluginRefererURL to PPB_URLUtil_Dev interface to get the 'Referer' HTTP header value that wa…

ppapi/thunk/ppb_url_util_thunk.cc

 // 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.
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/shared_impl/ppb_url_util_shared.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_instance_api.h"
 #include "ppapi/thunk/thunk.h"
 
@@ skipping 35 matching lines @@
 }
 
 PP_Var GetPluginInstanceURL(PP_Instance instance,
                             PP_URLComponents_Dev* components) {
   EnterInstance enter(instance);
   if (enter.failed())
     return PP_MakeUndefined();
   return enter.functions()->GetPluginInstanceURL(instance, components);
 }
 
+PP_Var GetPluginRefererURL(PP_Instance instance,
+                           PP_URLComponents_Dev* components) {
+  EnterInstance enter(instance);
+  if (enter.failed())
+    return PP_MakeUndefined();
+  return enter.functions()->GetPluginRefererURL(instance, components);
+}
+
 const PPB_URLUtil_Dev g_ppb_url_util = {
   &PPB_URLUtil_Shared::Canonicalize,
   &PPB_URLUtil_Shared::ResolveRelativeToURL,
   &ResolveRelativeToDocument,
   &PPB_URLUtil_Shared::IsSameSecurityOrigin,
   &DocumentCanRequest,
   &DocumentCanAccessDocument,
   &GetDocumentURL,
-  &GetPluginInstanceURL
+  &GetPluginInstanceURL,
+  &GetPluginRefererURL
 };
 
 }  // namespace
 
 const PPB_URLUtil_Dev_0_6* GetPPB_URLUtil_Dev_0_6_Thunk() {
   return &g_ppb_url_util;
 }
 
 }  // namespace thunk
 }  // namespace ppapi