Fix for Multipage selection by dragging mouse in OOP case in PDF.

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 176 matching lines @@
       if ((zoomDelta > MIN_ZOOM_DELTA) && !this.setZoomInProgress_)
         this.viewport_.setZoom(zoomChangeInfo.newZoomFactor);
     }.bind(this));
   }
 
   // Parse open pdf parameters.
   this.paramsParser_ = new OpenPDFParamsParser();
   this.navigator_ = new Navigator(this.streamDetails_.originalUrl,
       this.viewport_, this.paramsParser_, onNavigateInCurrentTab,
       onNavigateInNewTab);
+  this.viewportScroller_ =
+      new ViewportScroller(this.viewport_, this.plugin_, window);
 }
 
 PDFViewer.prototype = {
   /**
    * @private
    * Handle key events. These may come from the user directly or via the
    * scripting API.
    * @param {KeyboardEvent} e the event to handle.
    */
   handleKeyEvent_: function(e) {
@@ skipping 134 matching lines @@
   rotateCounterClockwise_: function() {
     this.plugin_.postMessage({
       type: 'rotateCounterclockwise'
     });
   },
 
   /**
    * @private
    * Notify the plugin to print.
    */
-  print_: function() {
-    this.plugin_.postMessage({
-      type: 'print'
-    });
-  },
+  print_: function() { this.plugin_.postMessage({type: 'print'}); },
 
   /**
    * @private
    * Notify the plugin to save.
    */
-  save_: function() {
-    this.plugin_.postMessage({
-      type: 'save'
-    });
-  },
+  save_: function() { this.plugin_.postMessage({type: 'save'}); },
 
   /**
    * @private
    * Handle open pdf parameters. This function updates the viewport as per
    * the parameters mentioned in the url while opening pdf. The order is
    * important as later actions can override the effects of previous actions.
    */
   handleURLParams_: function() {
     var urlParams =
         this.paramsParser_.getViewportFromUrlParams(
@@ skipping 141 matching lines @@
       case 'cancelStreamUrl':
         chrome.mimeHandlerPrivate.abortStream();
         break;
       case 'bookmarks':
         this.bookmarks_ = message.data.bookmarks;
         if (this.isMaterial_ && this.bookmarks_.length !== 0) {
           $('bookmarks-container').bookmarks = this.bookmarks;
           this.materialToolbar_.hasBookmarks = true;
         }
         break;
+      case 'setIsSelecting':
+        this.viewportScroller_.setEnableScrolling(message.data.isSelecting);
+        break;
     }
   },
 
   /**
    * @private
    * A callback that's called before the zoom changes. Notify the plugin to stop
    * reacting to scroll events while zoom is taking place to avoid flickering.
    */
   beforeZoom_: function() {
     this.plugin_.postMessage({
@@ skipping 228 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_;
   }
 };