Eliminate redundant IPC used for showing the Windows virtual keyboard

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 3e3e7d471714978ed8b8ca7e1f3f2abc5ef9fa96..232511b053fb7d4e39ec59b01f57cc4f2afbeb43 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -1120,10 +1120,13 @@ IPC_MESSAGE_ROUTED0(ViewHostMsg_Focus)
 IPC_MESSAGE_ROUTED0(ViewHostMsg_Blur)
 
 // Message sent from renderer to the browser when focus changes inside the
-// webpage. The parameter says whether the newly focused element needs
-// keyboard input (true for textfields, text areas and content editable divs).
-IPC_MESSAGE_ROUTED1(ViewHostMsg_FocusedNodeChanged,
-    bool /* is_editable_node */)
+// webpage. The parameters say whether the newly focused element needs
+// keyboard input (true for textfields, text areas and content editable divs),
+// and which input event type triggered the change (WebInputEvent::Undefined if
+// the change was not caused by an input event).
+IPC_MESSAGE_ROUTED2(ViewHostMsg_FocusedNodeChanged,
+    bool /* is_editable_node */,
+    blink::WebInputEvent::Type /* causal_event_type */)
 
 IPC_MESSAGE_ROUTED1(ViewHostMsg_SetCursor, content::WebCursor)
 
@@ -1526,12 +1529,6 @@ IPC_MESSAGE_CONTROL1(ViewHostMsg_Vibrate,
 // vibration, if there is one.
 IPC_MESSAGE_CONTROL0(ViewHostMsg_CancelVibration)
 
-// 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 */)
-
 // Message sent from the renderer to the browser when an HTML form has failed
 // validation constraints.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_ShowValidationMessage,