WebUI: Fix more violations of no-extra-semi lint rule.

chrome/browser/resources/pdf/zoom_manager.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.
 
 'use strict';
 
 /**
  * Abstract parent of classes that manage updating the browser
  * with zoom changes and/or updating the viewer's zoom when
  * the browser zoom changes.
@@ skipping 68 matching lines @@
    * @param {number} a The first number.
    * @param {number} b The second number.
    */
   floatingPointEquals(a, b) {
     let MIN_ZOOM_DELTA = 0.01;
     // If the zoom level is close enough to the current zoom level, don't
     // change it. This avoids us getting into an infinite loop of zoom changes
     // due to floating point error.
     return Math.abs(a - b) <= MIN_ZOOM_DELTA;
   }
-};
+}
 
 /**
  * InactiveZoomManager has no control over the browser's zoom
  * and does not respond to browser zoom changes.
  */
-class InactiveZoomManager extends ZoomManager {};
+class InactiveZoomManager extends ZoomManager {}
 
 /**
  * ActiveZoomManager controls the browser's zoom.
  */
 class ActiveZoomManager extends ZoomManager {
   /**
    * Constructs a ActiveZoomManager.
    * @param {!Viewport} viewport A Viewport for which to manage zoom.
    * @param {Function} setBrowserZoomFunction A function that sets the browser
    *     zoom to the provided value.
@@ skipping 67 matching lines @@
    * Given a zoom level, return the internal zoom level needed to
    * produce that zoom level.
    * @param {number} totalZoom the total zoom level.
    * @return {number} the zoom level internal to the viewer.
    */
   internalZoomComponent(totalZoom) {
     // The internal zoom and browser zoom are changed together, so the
     // internal zoom is the total zoom.
     return totalZoom;
   }
-};
+}
 
 /**
  * This EmbeddedZoomManager responds to changes in the browser zoom,
  * but does not control the browser zoom.
  */
 class EmbeddedZoomManager extends ZoomManager {
   /**
    * Invoked when a browser-initiated zoom-level change occurs.
    * @param {number} newZoom the new browser zoom level.
    */
   onBrowserZoomChange(newZoom) {
     let oldZoom = this.browserZoom_;
     this.browserZoom_ = newZoom;
     this.viewport_.updateZoomFromBrowserChange(oldZoom);
   }
-};
+}