Fix 6 warnings in components/ (#3141)

core/components/component.js

@@ -39,10 +39,8 @@ goog.require('Blockly.utils.style');
 Blockly.Component = function() {
 
   /**
-   * Whether the component is rendered right-to-left.  Right-to-left is set
-   * lazily when {@link #isRightToLeft} is called the first time, unless it has
-   * been set by calling {@link #setRightToLeft} explicitly.
-   * @private {?boolean}
+   * Whether the component is rendered right-to-left.
+   * @private {boolean}
    */
   this.rightToLeft_ = Blockly.Component.defaultRightToLeft;
 

core/components/menu/menu.js

@@ -270,7 +270,9 @@ Blockly.Menu.prototype.setHighlightedIndex = function(index) {
   // Bring the highlighted item into view. This has no effect if the menu is not
   // scrollable.
   if (child) {
-    Blockly.utils.style.scrollIntoContainerView(child.getElement(), this.getElement());
+    Blockly.utils.style.scrollIntoContainerView(
+        /** @type {!Element} */ (child.getElement()),
+        /** @type {!Element} */ (this.getElement()));
   }
 };
 

core/components/tree/treecontrol.js

@@ -262,6 +262,7 @@ Blockly.tree.TreeControl.prototype.exitDocument = function() {
 /**
  * Adds the event listeners to the tree.
  * @private
+ * @suppress {deprecated}
  */
 Blockly.tree.TreeControl.prototype.attachEvents_ = function() {
   var el = this.getElement();