DevTools: remove dead code, disambiguate expand for sections.

third_party/WebKit/Source/devtools/front_end/sources/WatchExpressionsSidebarPane.js

 /*
  * Copyright (C) IBM Corp. 2009  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 57 matching lines @@
     {
         this._requiresUpdate = true;
         this._refreshExpressionsIfNeeded();
     },
 
     /**
      * @param {string} expressionString
      */
     addExpression: function(expressionString)
     {
-        this.expand();
+        this.expandPane();
         if (this._requiresUpdate) {
             this._rebuildWatchExpressions();
             delete this._requiresUpdate;
         }
         this._createWatchExpression(expressionString);
         this._saveExpressions();
     },
 
     expandIfNecessary: function()
     {
         if (this._watchExpressionsSetting.get().length)
-            this.expand();
+            this.expandPane();
     },
 
     _saveExpressions: function()
     {
         var toSave = [];
         for (var i = 0; i < this._watchExpressions.length; i++)
             if (this._watchExpressions[i].expression())
                 toSave.push(this._watchExpressions[i].expression());
 
         this._watchExpressionsSetting.set(toSave);
     },
 
     _refreshExpressionsIfNeeded: function()
     {
         if (this._requiresUpdate && this.isShowing()) {
             this._rebuildWatchExpressions();
             delete this._requiresUpdate;
         } else
             this._requiresUpdate = true;
     },
 
     /**
      * @param {!WebInspector.Event=} event
      */
     _addButtonClicked: function(event)
     {
         if (event)
             event.consume(true);
-        this.expand();
+        this.expandPane();
         this._createWatchExpression(null).startEditing();
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _refreshButtonClicked: function(event)
     {
         event.consume();
         this.refreshExpressions();
@@ skipping 306 matching lines @@
             contextMenu.appendApplicableItems(this._result);
     },
 
     _copyValueButtonClicked: function()
     {
         InspectorFrontendHost.copyText(this._valueElement.textContent);
     },
 
     __proto__: WebInspector.Object.prototype
 }