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

Source/devtools/front_end/emulation/OverridesUI.js

 // Copyright 2014 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.
 
 WebInspector.OverridesUI = {}
 
 /**
  * @constructor
  * @param {!Element} rotateButton
  * @param {?function(!WebInspector.EmulatedDevice, !WebInspector.EmulatedDevice.Mode)} callback
  */
 WebInspector.DeviceSelect = function(rotateButton, callback)
 {
     this._callback = callback;
     this._rotateButton = rotateButton;
     this.element = createElement("p");
 
     this._deviceSelectElement = this.element.createChild("select", "device-select");
     this._deviceSelectElement.addEventListener("change", this._deviceSelected.bind(this), false);
 
     var container = this.element.createChild("div", "mode-container");
     container.appendChild(this._rotateButton);
     this._rotateButton.addEventListener("click", this._rotateButtonClicked.bind(this), false);
-    WebInspector.Tooltip.install(this._rotateButton, WebInspector.UIString("Change orientation"));
+    this._rotateButton.title = WebInspector.UIString("Change orientation");
 
     var modeSelectContainer = container.createChild("span", "mode-select");
     this._modeSelectElement = modeSelectContainer.createChild("select");
     this._modeSelectElement.addEventListener("change", this._modeSelected.bind(this), false);
     this._modeLabelElement = modeSelectContainer.createChild("label");
     this._modeLabelElement.addEventListener("click", this._rotateButtonClicked.bind(this), false);
-    WebInspector.Tooltip.install(this._modeLabelElement, WebInspector.UIString("Change orientation"));
+    this._modeLabelElement.title = WebInspector.UIString("Change orientation");
 
     this._emulatedSettingChangedMuted = false;
     this._lastOrientation = null;
 
     WebInspector.overridesSupport.settings.emulateResolution.addChangeListener(this._emulatedSettingChanged, this);
     WebInspector.overridesSupport.settings.deviceWidth.addChangeListener(this._emulatedSettingChanged, this);
     WebInspector.overridesSupport.settings.deviceHeight.addChangeListener(this._emulatedSettingChanged, this);
     WebInspector.overridesSupport.settings.deviceScaleFactor.addChangeListener(this._emulatedSettingChanged, this);
     WebInspector.overridesSupport.settings.emulateMobile.addChangeListener(this._emulatedSettingChanged, this);
     WebInspector.overridesSupport.settings.emulateTouch.addChangeListener(this._emulatedSettingChanged, this);
@@ skipping 324 matching lines @@
     {title: "iPhone \u2014 iOS 7", value: "Mozilla/5.0 (iPhone; CPU iPhone OS 7_0_2 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A4449d Safari/9537.53"},
     {title: "iPhone \u2014 iOS 6", value: "Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25"},
     {title: "MeeGo \u2014 Nokia N9", value: "Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13"},
     {title: "Opera 18 \u2014 Mac", value: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36 OPR/18.0.1284.68"},
     {title: "Opera 18 \u2014 Windows", value: "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36 OPR/18.0.1284.68"},
     {title: "Opera 12 \u2014 Mac", value: "Opera/9.80 (Macintosh; Intel Mac OS X 10.9.1) Presto/2.12.388 Version/12.16"},
     {title: "Opera 12 \u2014 Windows", value: "Opera/9.80 (Windows NT 6.1) Presto/2.12.388 Version/12.16"},
     {title: "Silk \u2014 Kindle Fire (Desktop view)", value: "Mozilla/5.0 (Linux; U; en-us; KFTHWI Build/JDQ39) AppleWebKit/535.19 (KHTML, like Gecko) Silk/3.13 Safari/535.19 Silk-Accelerated=true"},
     {title: "Silk \u2014 Kindle Fire (Mobile view)", value: "Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; KFTHWI Build/JDQ39) AppleWebKit/535.19 (KHTML, like Gecko) Silk/3.13 Mobile Safari/535.19 Silk-Accelerated=true"}
 ];