DevTools: replace mouseout with mouseleave where possible.

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 106 matching lines @@
     this.emptyElement.textContent = WebInspector.UIString("No Watch Expressions");
 
     this.watchExpressions = WebInspector.settings.watchExpressions.get();
 
     this.headerElement.className = "hidden";
     this.editable = true;
     this.expanded = true;
     this.propertiesElement.classList.add("watch-expressions");
 
     this.element.addEventListener("mousemove", this._mouseMove.bind(this), true);
-    this.element.addEventListener("mouseout", this._mouseOut.bind(this), true);
+    this.element.addEventListener("mouseleave", this._mouseLeave.bind(this), true);
     this.element.addEventListener("dblclick", this._sectionDoubleClick.bind(this), false);
     this.emptyElement.addEventListener("contextmenu", this._emptyElementContextMenu.bind(this), false);
 }
 
 WebInspector.WatchExpressionsSection.NewWatchExpression = "\xA0";
 
 WebInspector.WatchExpressionsSection.prototype = {
     /**
      * @param {!Event=} e
      */
@@ skipping 166 matching lines @@
         WebInspector.settings.watchExpressions.set(toSave);
         return toSave.length;
     },
 
     _mouseMove: function(e)
     {
         if (this.propertiesElement.firstChild)
             this._updateHoveredElement(e.pageY);
     },
 
-    _mouseOut: function()
+    _mouseLeave: function()
     {
         if (this._hoveredElement) {
             this._hoveredElement.classList.remove("hovered");
             delete this._hoveredElement;
         }
         delete this._lastMouseMovePageY;
     },
 
     _updateHoveredElement: function(pageY)
     {
@@ skipping 204 matching lines @@
     },
 
     oncollapse: function()
     {
         WebInspector.ObjectPropertyTreeElement.prototype.oncollapse.call(this);
         delete this.treeOutline.section._expandedProperties[this.propertyPath()];
     },
 
     __proto__: WebInspector.ObjectPropertyTreeElement.prototype
 }