Start splitting out WebUI into an implementation class and an interface that each page implements...

content/public/browser/web_ui_controller.cc

+// 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.
+
+#include "content/public/browser/web_ui_controller.h"
+
+namespace content {
+
+bool WebUIController::OverrideHandleWebUIMessage(const GURL& source_url,
+                                                 const std::string& message,
+                                                 const base::ListValue& args) {
+  return false;
+}
+
+}  // namespace content