PDF: Delete non-material viewer

chrome/browser/resources/pdf/elements/viewer-toolbar/viewer-toolbar.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.
-
-Polymer({
-  is: 'viewer-toolbar',
-
-  properties: {
-    fadingIn: {
-      type: Boolean,
-      value: false,
-      observer: 'fadingInChanged'
-    }
-  },
-
-  timerId_: undefined,
-
-  inInitialFadeIn_: false,
-
-  ready: function() {
-    this.mousemoveCallback = function(e) {
-      var rect = this.getBoundingClientRect();
-      if (e.clientX >= rect.left && e.clientX <= rect.right &&
-          e.clientY >= rect.top && e.clientY <= rect.bottom) {
-        this.fadingIn = true;
-        // If we hover over the toolbar, cancel the initial fade in.
-        if (this.inInitialFadeIn_)
-          this.inInitialFadeIn_ = false;
-      } else {
-        // Initially we want to keep the toolbar up for a longer period.
-        if (!this.inInitialFadeIn_)
-          this.fadingIn = false;
-      }
-    }.bind(this);
-  },
-
-  attached: function() {
-    this.parentNode.addEventListener('mousemove', this.mousemoveCallback);
-  },
-
-  detached: function() {
-    this.parentNode.removeEventListener('mousemove', this.mousemoveCallback);
-  },
-
-  initialFadeIn: function() {
-    this.inInitialFadeIn_ = true;
-    this.fadeIn();
-    this.fadeOutAfterDelay(6000);
-  },
-
-  fadingInChanged: function() {
-    if (this.fadingIn) {
-      this.fadeIn();
-    } else {
-      if (this.timerId_ === undefined)
-        this.fadeOutAfterDelay(3000);
-    }
-  },
-
-  fadeIn: function() {
-    this.style.opacity = 1;
-    clearTimeout(this.timerId_);
-    this.timerId_ = undefined;
-  },
-
-  fadeOutAfterDelay: function(delay) {
-    this.timerId_ = setTimeout(
-      function() {
-        this.style.opacity = 0;
-        this.timerId_ = undefined;
-        this.inInitialFadeIn_ = false;
-      }.bind(this), delay);
-  }
-});