Add machinery to show touch editing context menus in OOPIFs.

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 410 matching lines @@
 // message in response.
 IPC_MESSAGE_ROUTED2(ViewMsg_WasShown,
                     bool /* needs_repainting */,
                     ui::LatencyInfo /* latency_info */)
 
 // Tells the renderer to focus the first (last if reverse is true) focusable
 // node.
 IPC_MESSAGE_ROUTED1(ViewMsg_SetInitialFocus,
                     bool /* reverse */)
 
-// Sent to inform the renderer to invoke a context menu.
-// The parameter specifies the location in the render view's coordinates.
-IPC_MESSAGE_ROUTED2(ViewMsg_ShowContextMenu,
-                    ui::MenuSourceType,
-                    gfx::Point /* location where menu should be shown */)
-
 // Tells the renderer to perform the given action on the media player
 // located at the given point.
 IPC_MESSAGE_ROUTED2(ViewMsg_MediaPlayerActionAt,
                     gfx::Point, /* location */
                     blink::WebMediaPlayerAction)
 
 // Tells the renderer to perform the given action on the plugin located at
 // the given point.
 IPC_MESSAGE_ROUTED2(ViewMsg_PluginActionAt,
                     gfx::Point, /* location */
@@ skipping 437 matching lines @@
                     int /* y */)
 
 #elif defined(OS_MACOSX)
 // Receives content of a web page as plain text.
 IPC_MESSAGE_ROUTED1(ViewMsg_GetRenderedTextCompleted, std::string)
 #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.