DevTools: Fix frontend compilation errors uncovered by r184188

Source/devtools/front_end/toolbox/ToolboxDelegate.js

Index: Source/devtools/front_end/toolbox/ToolboxDelegate.js
diff --git a/Source/devtools/front_end/toolbox/ToolboxDelegate.js b/Source/devtools/front_end/toolbox/ToolboxDelegate.js
deleted file mode 100644
index 0e0ddb6966c9d6461c018d06a472fc5636351d19..0000000000000000000000000000000000000000
--- a/Source/devtools/front_end/toolbox/ToolboxDelegate.js
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2014 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.
-
-/**
- * @interface
- */
-WebInspector.ToolboxDelegate = function() {}
-
-WebInspector.ToolboxDelegate.prototype = {
-    /**
-     * @param {!Element} rootElement
-     */
-    toolboxLoaded: function(rootElement) {},
-
-    /**
-     * @return {!InspectorFrontendHostAPI}
-     */
-    inspectorFrontendHost: function() {}
-}