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

content/common/view_messages.h

Index: content/common/view_messages.h
===================================================================
--- content/common/view_messages.h	(revision 237093)
+++ content/common/view_messages.h	(working copy)
@@ -2253,6 +2253,12 @@
 IPC_MESSAGE_ROUTED1(ViewHostMsg_DidFirstVisuallyNonEmptyPaint,
                     int /* page_id */)
 
+// 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(ViewHostMsg_FocusedNodeTouched,
+                    bool /* editable */)
+
 #if defined(OS_ANDROID)
 // Response to ViewMsg_FindMatchRects.
 //