This is a rename of the term 'Greasemonkey' to 'user script' in Chromium.

chrome/common/render_messages_internal.h

 // Copyright (c) 2006-2008 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <string>
 #include <vector>
@@ skipping 147 matching lines @@
   // image at that location).
   IPC_MESSAGE_ROUTED2(ViewMsg_CopyImageAt,
                       int /* x */,
                       int /* y */)
 
   // History system notification that the visited link database has been
   // replaced. It has one SharedMemoryHandle argument consisting of the table
   // handle. This handle is valid in the context of the renderer
   IPC_MESSAGE_CONTROL1(ViewMsg_VisitedLink_NewTable, base::SharedMemoryHandle)
 
-  // Notification that the Greasemonkey scripts have been updated. It has one
+  // Notification that the user scripts have been updated. It has one
   // SharedMemoryHandle argument consisting of the pickled script data. This
   // handle is valid in the context of the renderer.
-  IPC_MESSAGE_CONTROL1(ViewMsg_Greasemonkey_NewScripts, base::SharedMemoryHandle)
+  IPC_MESSAGE_CONTROL1(ViewMsg_UserScripts_NewScripts, base::SharedMemoryHandle)
 
   // Sent when the user wants to search for a word on the page (find in page).
   // Request parameters are passed in as a FindInPageMsg_Request struct.
   IPC_MESSAGE_ROUTED1(ViewMsg_Find, FindInPageRequest)
 
   // Sent when the headers are available for a resource request.
   IPC_MESSAGE_ROUTED2(ViewMsg_Resource_ReceivedResponse,
                       int /* request_id */,
                       ViewMsg_Resource_ResponseHead)
 
@@ skipping 924 matching lines @@
 #endif  // defined(OS_WIN)
 
   // Queries the browser for suggestion for autofill in a form input field.
   IPC_MESSAGE_ROUTED4(ViewHostMsg_QueryFormFieldAutofill,
                       std::wstring /* field name */,
                       std::wstring /* user entered text */,
                       int64 /* id of the text input field */,
                       int /* id of this message */)
 
 IPC_END_MESSAGES(ViewHost)