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

Source/devtools/front_end/emulation/OverridesUI.js

Index: Source/devtools/front_end/emulation/OverridesUI.js
diff --git a/Source/devtools/front_end/emulation/OverridesUI.js b/Source/devtools/front_end/emulation/OverridesUI.js
index 185f40cd3dcbeceff7006439ab743bb411d74bb5..f25a3ea627ead651c137448bb2fdccaac4915cba 100644
--- a/Source/devtools/front_end/emulation/OverridesUI.js
+++ b/Source/devtools/front_end/emulation/OverridesUI.js
@@ -21,14 +21,14 @@ WebInspector.DeviceSelect = function(rotateButton, callback)
     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;