PDF Viewer update: Show document title in new toolbar.

Fixed: 1100429
Change-Id: I100e069dc5dc249647f7ed5697d8e36bbce932af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2276762
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784299}

chrome/browser/resources/pdf/elements/viewer-pdf-toolbar-new.html

@@ -100,7 +100,7 @@
 <!-- TODO(dpapad): Replace with the final icons provided by UX -->
 <div id="start">
   <cr-icon-button id="menuButton" iron-icon="cr20:menu"></cr-icon-button>
-  <span>Title</span>
+  <span>[[docTitle]]</span>
 </div>
 <div id="center">
   <viewer-page-selector doc-length="[[docLength]]" page-no="[[pageNo]]">

chrome/browser/resources/pdf/elements/viewer-pdf-toolbar-new.js

@@ -23,6 +23,7 @@ class ViewerPdfToolbarNewElement extends PolymerElement {
 
   static get properties() {
     return {
+      docTitle: String,
       docLength: Number,
       pageNo: Number,
 

chrome/browser/resources/pdf/pdf_viewer.html

@@ -37,7 +37,7 @@
 </template>
 <template is="dom-if" if="[[pdfViewerUpdateEnabled_]]">
   <viewer-pdf-toolbar-new id="toolbar"
-      doc-length="[[docLength_]]" page-no="[[pageNo_]]"
+      doc-title="[[title_]]" doc-length="[[docLength_]]" page-no="[[pageNo_]]"
       load-progress="[[loadProgress_]]" hidden>
   </viewer-pdf-toolbar-new>
 </template>