Merge html-office-public repo into src

chrome/browser/resources/pdf/elements/viewer-page-indicator/viewer-page-indicator.js

Index: chrome/browser/resources/pdf/elements/viewer-page-indicator/viewer-page-indicator.js
diff --git a/chrome/browser/resources/pdf/elements/viewer-page-indicator/viewer-page-indicator.js b/chrome/browser/resources/pdf/elements/viewer-page-indicator/viewer-page-indicator.js
new file mode 100644
index 0000000000000000000000000000000000000000..8612e170348f1894f46296e0dc5e2be93c984c33
--- /dev/null
+++ b/chrome/browser/resources/pdf/elements/viewer-page-indicator/viewer-page-indicator.js
@@ -0,0 +1,42 @@
+// 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('viewer-page-indicator', {
+  label: '1',
+  index: 0,
+  timerId: undefined,
+  pageLabels: null,
+  ready: function() {
+    var callback = this.fadeIn.bind(this, 2000);
+    window.addEventListener('scroll', function() {
+      requestAnimationFrame(callback);
+    });
+  },
+  initialFadeIn: function() {
+    this.fadeIn(6000);
+  },
+  fadeIn: function(displayTime) {
+    var percent = window.scrollY /
+        (document.body.scrollHeight -
+         document.documentElement.clientHeight);
+    this.style.top = percent *
+        (document.documentElement.clientHeight - this.offsetHeight) + 'px';
+    this.style.opacity = 1;
+    clearTimeout(this.timerId);
+
+    this.timerId = setTimeout(function() {
+      this.style.opacity = 0;
+      this.timerId = undefined;
+    }.bind(this), displayTime);
+  },
+  pageLabelsChanged: function() {
+    this.indexChanged();
+  },
+  indexChanged: function() {
+    if (this.pageLabels)
+      this.label = this.pageLabels[this.index];
+    else
+      this.label = String(this.index + 1);
+  }
+});