Print Preview: Add option to rasterize PDFs and add JPEG compression.

chrome/browser/resources/print_preview/previewarea/preview_area.js

 // Copyright (c) 2012 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.
 
 /**
  * @typedef {{accessibility: Function,
  *            documentLoadComplete: Function,
  *            getHeight: Function,
  *            getHorizontalScrollbarThickness: Function,
  *            getPageLocationNormalized: Function,
@@ skipping 355 matching lines @@
           print_preview.ticket_items.TicketItem.EventType.CHANGE,
           this.onTicketChange_.bind(this));
       this.tracker.add(
           this.printTicketStore_.selectionOnly,
           print_preview.ticket_items.TicketItem.EventType.CHANGE,
           this.onTicketChange_.bind(this));
       this.tracker.add(
           this.printTicketStore_.scaling,
           print_preview.ticket_items.TicketItem.EventType.CHANGE,
           this.onTicketChange_.bind(this));
+      this.tracker.add(
+          this.printTicketStore_.rasterize,
+          print_preview.ticket_items.TicketItem.EventType.CHANGE,
+          this.onTicketChange_.bind(this));
+
 
       if (this.checkPluginCompatibility_()) {
         this.previewGenerator_ = new print_preview.PreviewGenerator(
             this.destinationStore_,
             this.printTicketStore_,
             this.nativeLayer_,
             this.documentInfo_);
         this.tracker.add(
             this.previewGenerator_,
             print_preview.PreviewGenerator.EventType.PREVIEW_START,
@@ skipping 122 matching lines @@
     /**
      * Creates a preview plugin and adds it to the DOM.
      * @param {string} srcUrl Initial URL of the plugin.
      * @private
      */
     createPlugin_: function(srcUrl) {
       if (this.plugin_) {
         console.warn('Pdf preview plugin already created');
         return;
       }
-
       this.plugin_ = /** @type {print_preview.PDFPlugin} */(
           PDFCreateOutOfProcessPlugin(srcUrl));
       this.plugin_.setKeyEventCallback(this.keyEventCallback_);
 
       this.plugin_.setAttribute('class', 'preview-area-plugin');
       this.plugin_.setAttribute('aria-live', 'polite');
       this.plugin_.setAttribute('aria-atomic', 'true');
       // NOTE: The plugin's 'id' field must be set to 'pdf-viewer' since
       // chrome/renderer/printing/print_web_view_helper.cc actually references
       // it.
@@ skipping 164 matching lines @@
       // being draggable.
       this.plugin_.style.pointerEvents = isDragging ? 'none' : 'auto';
     }
   };
 
   // Export
   return {
     PreviewArea: PreviewArea
   };
 });