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

ppapi/cpp/dev/url_util_dev.h

 // Copyright (c) 2011 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 PPAPI_CPP_DEV_URL_UTIL_DEV_H_
 #define PPAPI_CPP_DEV_URL_UTIL_DEV_H_
 
 #include "ppapi/c/dev/ppb_url_util_dev.h"
 #include "ppapi/cpp/var.h"
 
@@ skipping 23 matching lines @@
 
   bool IsSameSecurityOrigin(const Var& url_a, const Var& url_b) const;
   bool DocumentCanRequest(const InstanceHandle& instance, const Var& url) const;
   bool DocumentCanAccessDocument(const InstanceHandle& active,
                                  const InstanceHandle& target) const;
   Var GetDocumentURL(const InstanceHandle& instance,
                      PP_URLComponents_Dev* components = NULL) const;
 
   Var GetPluginInstanceURL(const InstanceHandle& instance,
                            PP_URLComponents_Dev* components = NULL) const;
+  Var GetPluginReferrerURL(const InstanceHandle& instance,
+                           PP_URLComponents_Dev* components = NULL) const;
 
  private:
   URLUtil_Dev() : interface_(NULL) {}
 
   // Copy and assignment are disallowed.
   URLUtil_Dev(const URLUtil_Dev& other);
   URLUtil_Dev& operator=(const URLUtil_Dev& other);
 
   const PPB_URLUtil_Dev* interface_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_URL_UTIL_DEV_H_