Ensure that the OSK on Windows 8 shows up when we tap on an editable field in any WebContents.

chrome/common/render_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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 639 matching lines @@
 
 #if defined(OS_ANDROID)
 // Contains info about whether the current page can be treated as a webapp.
 IPC_MESSAGE_ROUTED4(ChromeViewHostMsg_DidRetrieveWebappInformation,
                     bool /* success */,
                     bool /* is_mobile_webapp_capable */,
                     bool /* is_apple_mobile_webapp_capable */,
                     GURL /* expected_url */)
 #endif  // defined(OS_ANDROID)
 
-// Message sent from renderer to the browser when the element that is focused
-// has been touched. A bool is passed in this message which indicates if the
-// node is editable.
-IPC_MESSAGE_ROUTED1(ChromeViewHostMsg_FocusedNodeTouched,
-                    bool /* editable */)
-
 // The currently displayed PDF has an unsupported feature.
 IPC_MESSAGE_ROUTED0(ChromeViewHostMsg_PDFHasUnsupportedFeature)
 
 // Brings up SaveAs... dialog to save specified URL.
 IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_PDFSaveURLAs,
                     GURL /* url */,
                     content::Referrer /* referrer */)
 
 // Updates the content restrictions, i.e. to disable print/copy.
 IPC_MESSAGE_ROUTED1(ChromeViewHostMsg_PDFUpdateContentRestrictions,
@@ skipping 93 matching lines @@
                      std::vector<GURL> /* search_urls */,
                      GURL /* new_tab_page_url */)
 
 // Tells listeners that a detailed message was reported to the console by
 // WebKit.
 IPC_MESSAGE_ROUTED4(ChromeViewHostMsg_DetailedConsoleMessageAdded,
                     string16 /* message */,
                     string16 /* source */,
                     extensions::StackTrace /* stack trace */,
                     int32 /* severity level */)