OnExtensionCloseChannel  118 chrome/browser/renderer_host/chrome_render_message_filter.cc     IPC_MESSAGE_HANDLER(ExtensionHostMsg_CloseChannel, OnExtensionCloseChannel)
OnExtensionCloseChannel  116 chrome/browser/renderer_host/chrome_render_message_filter.h   void OnExtensionCloseChannel(int port_id, const std::string& error_message);