Require ACK for editor-related changes not originating from browser.

content/common/view_messages.h

 // 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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "base/strings/string16.h"
@@ skipping 1298 matching lines @@
 // Tell the renderer that plugin IME has completed.
 IPC_MESSAGE_ROUTED2(ViewMsg_PluginImeCompositionCompleted,
                     string16 /* text */,
                     int /* plugin_id */)
 
 // External popup menus.
 IPC_MESSAGE_ROUTED1(ViewMsg_SelectPopupMenuItem,
                     int /* selected index, -1 means no selection */)
 #endif
 
+// Sent by the browser when an IME update that requires acknowledgement has been
+// processed on the browser side.
+IPC_MESSAGE_ROUTED0(ViewMsg_AcknowledgeImeEvent)
+
 // Sent by the browser as a reply to ViewHostMsg_SwapCompositorFrame.
 IPC_MESSAGE_ROUTED1(ViewMsg_SwapCompositorFrameAck,
                     cc::CompositorFrameAck /* ack */)
 
 // Sent by the browser to ask the renderer for a snapshot of the current view.
 IPC_MESSAGE_ROUTED1(ViewMsg_Snapshot,
                     gfx::Rect /* src_subrect */)
 
 // -----------------------------------------------------------------------------
 // Messages sent from the renderer to the browser.
@@ skipping 996 matching lines @@
 // Since the browser keeps handles to the allocated transport DIBs, this
 // message is sent to tell the browser that it may release them when the
 // renderer is finished with them.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_FreeTransportDIB,
                      TransportDIB::Id /* DIB id */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.