Change ppapi C++ comment style into C.

ppapi/c/ppb_url_request_info.h

-// Copyright (c) 2010 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.
-
+/* Copyright (c) 2010 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_C_PPB_URL_REQUEST_INFO_H_
 #define PPAPI_C_PPB_URL_REQUEST_INFO_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_time.h"
 
@@ skipping 62 matching lines @@
   // A Content-Length request header will be automatically generated.
   //
   // Returns PP_FALSE if any of the parameters are invalid, PP_TRUE on success.
   PP_Bool (*AppendFileToBody)(PP_Resource request,
                               PP_Resource file_ref,
                               int64_t start_offset,
                               int64_t number_of_bytes,
                               PP_Time expected_last_modified_time);
 };
 
-#endif  // PPAPI_C_PPB_URL_REQUEST_INFO_H_
+#endif  /* PPAPI_C_PPB_URL_REQUEST_INFO_H_ */
+