PDF: Use PDF metadata for the title instead of the last path element.

chrome/browser/resources/pdf/pdf.js

 // Copyright 2013 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';
 
 /**
  * @return {number} Width of a scrollbar in pixels
  */
 function getScrollbarWidth() {
@@ skipping 131 matching lines @@
   this.plugin_.type = 'application/x-google-chrome-pdf';
   this.plugin_.addEventListener('message', this.handlePluginMessage_.bind(this),
                                 false);
 
   // Handle scripting messages from outside the extension that wish to interact
   // with it. We also send a message indicating that extension has loaded and
   // is ready to receive messages.
   window.addEventListener('message', this.handleScriptingMessage.bind(this),
                           false);
 
-  document.title = decodeURIComponent(
-      getFilenameFromURL(this.browserApi_.getStreamInfo().originalUrl));
   this.plugin_.setAttribute('src',
                             this.browserApi_.getStreamInfo().originalUrl);
   this.plugin_.setAttribute('stream-url',
                             this.browserApi_.getStreamInfo().streamUrl);
   var headers = '';
   for (var header in this.browserApi_.getStreamInfo().responseHeaders) {
     headers += header + ': ' +
         this.browserApi_.getStreamInfo().responseHeaders[header] + '\n';
   }
   this.plugin_.setAttribute('headers', headers);
@@ skipping 27 matching lines @@
     this.zoomToolbar_.addEventListener('fit-to-width',
         this.viewport_.fitToWidth.bind(this.viewport_));
     this.zoomToolbar_.addEventListener('fit-to-page',
         this.fitToPage_.bind(this));
     this.zoomToolbar_.addEventListener('zoom-in',
         this.viewport_.zoomIn.bind(this.viewport_));
     this.zoomToolbar_.addEventListener('zoom-out',
         this.viewport_.zoomOut.bind(this.viewport_));
 
     this.materialToolbar_ = $('material-toolbar');
-    this.materialToolbar_.docTitle = document.title;
     this.materialToolbar_.addEventListener('save', this.save_.bind(this));
     this.materialToolbar_.addEventListener('print', this.print_.bind(this));
     this.materialToolbar_.addEventListener('rotate-right',
         this.rotateClockwise_.bind(this));
     this.materialToolbar_.addEventListener('rotate-left',
         this.rotateCounterClockwise_.bind(this));
 
     document.body.addEventListener('change-page', function(e) {
       this.viewport_.goToPage(e.detail.page);
     }.bind(this));
@@ skipping 388 matching lines @@
         if (!this.isMaterial_) {
           this.progressBar_.text = message.data.loadingString;
           if (!this.isPrintPreview_)
             this.progressBar_.style.visibility = 'visible';
         }
         this.errorScreen_.text = message.data.loadFailedString;
         break;
       case 'cancelStreamUrl':
         chrome.mimeHandlerPrivate.abortStream();
         break;
-      case 'bookmarks':
+      case 'metadata':
+        if (message.data.title) {
+          document.title = message.data.title;
+        } else {
+          document.title = decodeURIComponent(
+              getFilenameFromURL(this.browserApi_.getStreamInfo().originalUrl));
+        }
         this.bookmarks_ = message.data.bookmarks;
-        if (this.isMaterial_ && this.bookmarks_.length !== 0)
+        if (this.isMaterial_) {
+          this.materialToolbar_.docTitle = document.title;
           this.materialToolbar_.bookmarks = this.bookmarks;
+        }
         break;
       case 'setIsSelecting':
         this.viewportScroller_.setEnableScrolling(message.data.isSelecting);
         break;
       case 'getNamedDestinationReply':
         this.paramsParser_.onNamedDestinationReceived(
             message.data.pageNumber);
         break;
     }
   },
@@ skipping 215 matching lines @@
    * Each bookmark is an Object containing a:
    * - title
    * - page (optional)
    * - array of children (themselves bookmarks)
    * @type {Array} the top-level bookmarks of the PDF.
    */
   get bookmarks() {
     return this.bookmarks_;
   }
 };