DevTools: propagate experiments that are enabled by default into default.

Source/devtools/front_end/ui/Tooltip.js

 // Copyright (c) 2015 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.
 
 /**
  * @constructor
  * @param {!Document} doc
  */
 WebInspector.Tooltip = function(doc)
 {
@@ skipping 114 matching lines @@
     new WebInspector.Tooltip(doc);
 }
 
 /**
  * @param {!Element} element
  * @param {!Element|string} tooltipContent
  * @param {string=} actionId
  */
 WebInspector.Tooltip.install = function(element, tooltipContent, actionId)
 {
-    if (Runtime.experiments.isEnabled("tooltips") && typeof tooltipContent === "string" && tooltipContent === "")
+    if (typeof tooltipContent === "string" && tooltipContent === "")
         return;
-    if (Runtime.experiments.isEnabled("tooltips"))
-        element[WebInspector.Tooltip._symbol] =  { content: tooltipContent, actionId: actionId };
-    else if (typeof tooltipContent === "string")
-        element.title = tooltipContent;
-    else
-        console.assert("Cannot set an element without custom tooltips enabled");
+    element[WebInspector.Tooltip._symbol] =  { content: tooltipContent, actionId: actionId };
 }