[web-ui] Migrate RegisterMessageCallback usage to base::bind().

chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc

Index: chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc
===================================================================
--- chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc	(revision 103795)
+++ chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc	(working copy)
@@ -4,7 +4,8 @@
 
 #include "chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.h"
 
-#include "base/callback.h"
+#include "base/bind.h"
+#include "base/bind_helpers.h"
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
@@ -273,9 +274,11 @@
 void KeyboardOverlayHandler::RegisterMessages() {
   DCHECK(web_ui_);
   web_ui_->RegisterMessageCallback("getInputMethodId",
-      NewCallback(this, &KeyboardOverlayHandler::GetInputMethodId));
+      base::Bind(&KeyboardOverlayHandler::GetInputMethodId,
+                 base::Unretained(this)));
   web_ui_->RegisterMessageCallback("getLabelMap",
-      NewCallback(this, &KeyboardOverlayHandler::GetLabelMap));
+      base::Bind(&KeyboardOverlayHandler::GetLabelMap,
+                 base::Unretained(this)));
 }
 
 void KeyboardOverlayHandler::GetInputMethodId(const ListValue* args) {