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diff --git a/ppapi/shared_impl/ppb_url_util_shared.h b/ppapi/shared_impl/ppb_url_util_shared.h
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+++ b/ppapi/shared_impl/ppb_url_util_shared.h
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+// 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_SHARED_IMPL_PPB_URL_UTIL_SHARED_H_
+#define PPAPI_SHARED_IMPL_PPB_URL_UTIL_SHARED_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "googleurl/src/url_parse.h"
+#include "ppapi/c/dev/ppb_url_util_dev.h"
+#include "ppapi/c/pp_module.h"
+#include "ppapi/c/pp_var.h"
+#include "ppapi/shared_impl/ppapi_shared_export.h"
+
+class GURL;
+
+namespace ppapi {
+
+// Contains the implementation of PPB_URLUtil that is shared between the proxy
+// and the renderer.
+class PPAPI_SHARED_EXPORT PPB_URLUtil_Shared {
+ public:
+  // PPB_URLUtil shared functions.
+  static PP_Var Canonicalize(PP_Var url,
+                             PP_URLComponents_Dev* components);
+  static PP_Var ResolveRelativeToURL(PP_Var base_url,
+                                     PP_Var relative,
+                                     PP_URLComponents_Dev* components);
+  static PP_Bool IsSameSecurityOrigin(PP_Var url_a, PP_Var url_b);
+
+  // Used for returning the given GURL from a PPAPI function, with an optional
+  // out param indicating the components.
+  static PP_Var GenerateURLReturn(PP_Module pp_module,
+                                  const GURL& url,
+                                  PP_URLComponents_Dev* components);
+
+  // Helper function that optionally take a components structure and fills it
+  // out with the parsed version of the given URL. If the components pointer is
+  // NULL, this function will do nothing.
+  //
+  // It's annoying to serialze the large PP_URLComponents structure across IPC
+  // and the data isn't often requested by plugins. This function is used on
+  // the plugin side to fill in the components for those cases where it's
+  // actually needed.
+  static PP_Var ConvertComponentsAndReturnURL(const PP_Var& url,
+                                              PP_URLComponents_Dev* components);
+};
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_PPB_URL_UTIL_SHARED_H_