Add Util functions to PDFJS.

src/util.js

@@ -76,7 +76,7 @@ function stringToBytes(str) {
 
 var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
 
-var Util = (function UtilClosure() {
+var Util = PDFJS.Util = (function UtilClosure() {
   function Util() {}
 
   Util.makeCssRgb = function Util_makeCssRgb(r, g, b) {

web/viewer.js

@@ -787,7 +787,7 @@ var PageView = function pageView(container, pdfPage, id, scale,
     }
     function createElementWithStyle(tagName, item) {
       var rect = viewport.convertToViewportRectangle(item.rect);
-      rect = Util.normalizeRect(rect);
+      rect = PDFJS.Util.normalizeRect(rect);
       var element = document.createElement(tagName);
       element.style.left = Math.floor(rect[0]) + 'px';
       element.style.top = Math.floor(rect[1]) + 'px';