DevTools: only set title w/ shortcut via Tooltip manager API.

Source/devtools/front_end/components_lazy/FilmStripView.js

 // Copyright 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
  * @extends {WebInspector.HBox}
  */
 WebInspector.FilmStripView = function()
 {
@@ skipping 46 matching lines @@
     },
 
     /**
      * @param {!WebInspector.FilmStripModel.Frame} frame
      * @return {!Promise<!Element>}
      */
     createFrameElement: function(frame)
     {
         var time = frame.timestamp;
         var element = createElementWithClass("div", "frame");
-        WebInspector.Tooltip.install(element, WebInspector.UIString("Doubleclick to zoom image. Click to view preceding requests."));
+        element.title = WebInspector.UIString("Doubleclick to zoom image. Click to view preceding requests.");
         element.createChild("div", "time").textContent = Number.millisToString(time - this._zeroTime);
         var imageElement = element.createChild("div", "thumbnail").createChild("img");
         element.addEventListener("mousedown", this._onMouseEvent.bind(this, WebInspector.FilmStripView.Events.FrameSelected, time), false);
         element.addEventListener("mouseenter", this._onMouseEvent.bind(this, WebInspector.FilmStripView.Events.FrameEnter, time), false);
         element.addEventListener("mouseout", this._onMouseEvent.bind(this, WebInspector.FilmStripView.Events.FrameExit, time), false);
         element.addEventListener("dblclick", this._onDoubleClick.bind(this, frame), false);
 
         return frame.imageDataPromise().then(WebInspector.FilmStripView._setImageData.bind(null, imageElement)).then(returnElement);
         /**
          * @return {!Element}
@@ skipping 239 matching lines @@
      */
     _render: function()
     {
         var frame = this._frames[this._index];
         this._timeLabel.textContent = Number.millisToString(frame.timestamp - this._zeroTime);
         return frame.imageDataPromise().then(WebInspector.FilmStripView._setImageData.bind(null, this._imageElement));
     },
 
     __proto__: WebInspector.DialogDelegate.prototype
 }