Fix license headers in a number of files

ppapi/native_client/tests/ppapi_geturl/ppapi_geturl.cc

-// Copyright 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.
+// 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 <cstdio>
 #include <cstdlib>
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_instance.h"
 
 #include "native_client/tests/ppapi_geturl/module.h"
 
 // Global PPP functions --------------------------------------------------------
@@ skipping 16 matching lines @@
 }
 
 PP_EXPORT const void* PPP_GetInterface(const char* interface_name) {
   printf("--- PPP_GetInterface(%s)\n", interface_name);
   fflush(stdout);
   Module* module = Module::Get();
   if (NULL == module)
     return NULL;
   return module->GetPluginInterface(interface_name);
 }