Fix for moving to previous url from PDF page in OOP case.

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 187 matching lines @@
         else
           pageDownHandler();
         return;
       case 33:  // Page up key.
         pageUpHandler();
         return;
       case 34:  // Page down key.
         pageDownHandler();
         return;
       case 37:  // Left arrow key.
-        // Go to the previous page if there are no horizontal scrollbars.
-        if (!this.viewport_.documentHasScrollbars().x) {
-          this.viewport_.goToPage(this.viewport_.getMostVisiblePage() - 1);
-          // Since we do the movement of the page.
-          e.preventDefault();
-        } else if (fromScriptingAPI) {
-          position.x -= Viewport.SCROLL_INCREMENT;
-          this.viewport.position = position;
+        if (!(e.altKey || e.ctrlKey || e.metaKey || e.shiftKey)) {
+          // Go to the previous page if there are no horizontal scrollbars.
+          if (!this.viewport_.documentHasScrollbars().x) {
+            this.viewport_.goToPage(this.viewport_.getMostVisiblePage() - 1);
+            // Since we do the movement of the page.
+            e.preventDefault();
+          } else if (fromScriptingAPI) {
+            position.x -= Viewport.SCROLL_INCREMENT;
+            this.viewport.position = position;
+          }
         }
         return;
       case 38:  // Up arrow key.
         if (fromScriptingAPI) {
           position.y -= Viewport.SCROLL_INCREMENT;
           this.viewport.position = position;
         }
         return;
       case 39:  // Right arrow key.
-        // Go to the next page if there are no horizontal scrollbars.
-        if (!this.viewport_.documentHasScrollbars().x) {
-          this.viewport_.goToPage(this.viewport_.getMostVisiblePage() + 1);
-          // Since we do the movement of the page.
-          e.preventDefault();
-        } else if (fromScriptingAPI) {
-          position.x += Viewport.SCROLL_INCREMENT;
-          this.viewport.position = position;
+        if (!(e.altKey || e.ctrlKey || e.metaKey || e.shiftKey)) {
+          // Go to the next page if there are no horizontal scrollbars.
+          if (!this.viewport_.documentHasScrollbars().x) {
+            this.viewport_.goToPage(this.viewport_.getMostVisiblePage() + 1);
+            // Since we do the movement of the page.
+            e.preventDefault();
+          } else if (fromScriptingAPI) {
+            position.x += Viewport.SCROLL_INCREMENT;
+            this.viewport.position = position;
+          }
         }
         return;
       case 40:  // Down arrow key.
         if (fromScriptingAPI) {
           position.y += Viewport.SCROLL_INCREMENT;
           this.viewport.position = position;
         }
         return;
       case 65:  // a key.
         if (e.ctrlKey || e.metaKey) {
@@ skipping 360 matching lines @@
               this.streamDetails.tabId != -1);
   },
 
   /**
    * @type {Viewport} the viewport of the PDF viewer.
    */
   get viewport() {
     return this.viewport_;
   }
 };