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

ppapi/c/dev/ppb_url_util_dev.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.
  */
 
 /* From dev/ppb_url_util_dev.idl modified Fri Dec 16 17:34:59 2011. */
 
 #ifndef PPAPI_C_DEV_PPB_URL_UTIL_DEV_H_
 #define PPAPI_C_DEV_PPB_URL_UTIL_DEV_H_
 
@@ skipping 145 matching lines @@
    * attribute on the <embed> element, but the rules are obscure and different
    * based on whether the plugin is loaded from an <embed> element or an
    * <object> element.
    * The components pointer, if non-NULL and the canonicalized URL is valid,
    * will identify the components of the resulting URL. Components may be NULL
    * to specify that no component information is necessary.
    */
   struct PP_Var (*GetPluginInstanceURL)(
       PP_Instance instance,
       struct PP_URLComponents_Dev* components);
+  /*
+   * Returns the Referer URL of the HTTP request that loaded the plugin. This is
+   * the value of the 'Referer' header of the request. An undefined value means
+   * the 'Referer' header was absent.
+   * The components pointer, if non-NULL and the canonicalized URL is valid,
+   * will identify the components of the resulting URL. Components may be NULL
+   * to specify that no component information is necessary.
+   */
+  struct PP_Var (*GetPluginRefererURL)(
+      PP_Instance instance,
+      struct PP_URLComponents_Dev* components);
 };
 
 typedef struct PPB_URLUtil_Dev_0_6 PPB_URLUtil_Dev;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_DEV_PPB_URL_UTIL_DEV_H_ */