Send the index in the canonical list over IPC when using the OOP plugin loader.

content/common/utility_messages.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.
 
 // Multiply-included message file, so no include guard.
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 51 matching lines @@
                      int /* id */)
 
 // Reply when the utility process has finished injecting an IDBKey into
 // a SerializedScriptValue.
 IPC_MESSAGE_CONTROL1(UtilityHostMsg_InjectIDBKey_Finished,
                      content::SerializedScriptValue /* new value */)
 
 #if defined(OS_POSIX)
 // Notifies the browser when a plugin failed to load so the two processes can
 // keep the canonical list in sync.
-IPC_SYNC_MESSAGE_CONTROL1_0(UtilityHostMsg_LoadPluginFailed,
+IPC_SYNC_MESSAGE_CONTROL2_0(UtilityHostMsg_LoadPluginFailed,
+                            uint32_t /* index in the vector */,
                             FilePath /* path of plugin */)
 
 // Notifies the browser that a plugin in the vector sent by it has been loaded.
-IPC_SYNC_MESSAGE_CONTROL1_0(UtilityHostMsg_LoadedPlugin,
+IPC_SYNC_MESSAGE_CONTROL2_0(UtilityHostMsg_LoadedPlugin,
+                            uint32_t /* index in the vector */,
                             webkit::WebPluginInfo /* plugin info */)
 #endif  // OS_POSIX