DevTools: reformat front-end code to match chromium style.

third_party/WebKit/Source/devtools/front_end/ui/ZoomManager.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.
-
 /**
- * @constructor
- * @extends {WebInspector.Object}
- * @param {!Window} window
- * @param {!InspectorFrontendHostAPI} frontendHost
+ * @unrestricted
  */
-WebInspector.ZoomManager = function(window, frontendHost)
-{
+WebInspector.ZoomManager = class extends WebInspector.Object {
+  /**
+   * @param {!Window} window
+   * @param {!InspectorFrontendHostAPI} frontendHost
+   */
+  constructor(window, frontendHost) {
+    super();
     this._frontendHost = frontendHost;
     this._zoomFactor = this._frontendHost.zoomFactor();
-    window.addEventListener("resize", this._onWindowResize.bind(this), true);
+    window.addEventListener('resize', this._onWindowResize.bind(this), true);
+  }
+
+  /**
+   * @return {number}
+   */
+  zoomFactor() {
+    return this._zoomFactor;
+  }
+
+  /**
+   * @param {number} value
+   * @return {number}
+   */
+  cssToDIP(value) {
+    return value * this._zoomFactor;
+  }
+
+  /**
+   * @param {number} valueDIP
+   * @return {number}
+   */
+  dipToCSS(valueDIP) {
+    return valueDIP / this._zoomFactor;
+  }
+
+  _onWindowResize() {
+    var oldZoomFactor = this._zoomFactor;
+    this._zoomFactor = this._frontendHost.zoomFactor();
+    if (oldZoomFactor !== this._zoomFactor)
+      this.dispatchEventToListeners(
+          WebInspector.ZoomManager.Events.ZoomChanged, {from: oldZoomFactor, to: this._zoomFactor});
+  }
 };
 
 /** @enum {symbol} */
 WebInspector.ZoomManager.Events = {
-    ZoomChanged: Symbol("ZoomChanged")
-};
-
-WebInspector.ZoomManager.prototype = {
-    /**
-     * @return {number}
-     */
-    zoomFactor: function()
-    {
-        return this._zoomFactor;
-    },
-
-    /**
-     * @param {number} value
-     * @return {number}
-     */
-    cssToDIP: function(value)
-    {
-        return value * this._zoomFactor;
-    },
-
-    /**
-     * @param {number} valueDIP
-     * @return {number}
-     */
-    dipToCSS: function(valueDIP)
-    {
-        return valueDIP / this._zoomFactor;
-    },
-
-    _onWindowResize: function()
-    {
-        var oldZoomFactor = this._zoomFactor;
-        this._zoomFactor = this._frontendHost.zoomFactor();
-        if (oldZoomFactor !== this._zoomFactor)
-            this.dispatchEventToListeners(WebInspector.ZoomManager.Events.ZoomChanged, {from: oldZoomFactor, to: this._zoomFactor});
-    },
-
-    __proto__: WebInspector.Object.prototype
+  ZoomChanged: Symbol('ZoomChanged')
 };
 
 /**
  * @type {!WebInspector.ZoomManager}
  */
 WebInspector.zoomManager;