Replaces literal {} created lookup tables with Object.create

src/display/api.js

@@ -873,7 +873,7 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
     this.objs = new PDFObjects();
     this.cleanupAfterRender = false;
     this.pendingCleanup = false;
-    this.intentStates = {};
+    this.intentStates = Object.create(null);
     this.destroyed = false;
   }
   PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
@@ -948,7 +948,7 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
       var renderingIntent = (params.intent === 'print' ? 'print' : 'display');
 
       if (!this.intentStates[renderingIntent]) {
-        this.intentStates[renderingIntent] = {};
+        this.intentStates[renderingIntent] = Object.create(null);
       }
       var intentState = this.intentStates[renderingIntent];
 
@@ -1040,7 +1040,7 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
 
       var renderingIntent = 'oplist';
       if (!this.intentStates[renderingIntent]) {
-        this.intentStates[renderingIntent] = {};
+        this.intentStates[renderingIntent] = Object.create(null);
       }
       var intentState = this.intentStates[renderingIntent];
 
@@ -1871,7 +1871,7 @@ var WorkerTransport = (function WorkerTransportClosure() {
  */
 var PDFObjects = (function PDFObjectsClosure() {
   function PDFObjects() {
-    this.objs = {};
+    this.objs = Object.create(null);
   }
 
   PDFObjects.prototype = {
@@ -1962,7 +1962,7 @@ var PDFObjects = (function PDFObjectsClosure() {
     },
 
     clear: function PDFObjects_clear() {
-      this.objs = {};
+      this.objs = Object.create(null);
     }
   };
   return PDFObjects;

src/display/dom_utils.js

@@ -39,7 +39,7 @@ var CustomStyle = (function CustomStyleClosure() {
   // in some versions of IE9 it is critical that ms appear in this list
   // before Moz
   var prefixes = ['ms', 'Moz', 'Webkit', 'O'];
-  var _cache = {};
+  var _cache = Object.create(null);
 
   function CustomStyle() {}
 

src/display/font_loader.js

@@ -340,7 +340,7 @@ Object.defineProperty(FontLoader, 'isSyncFontLoadingSupported', {
 
 var FontFaceObject = (function FontFaceObjectClosure() {
   function FontFaceObject(translatedData) {
-    this.compiledGlyphs = {};
+    this.compiledGlyphs = Object.create(null);
     // importing translated data
     for (var i in translatedData) {
       this[i] = translatedData[i];

src/display/metadata.js

@@ -58,7 +58,7 @@ var Metadata = PDFJS.Metadata = (function MetadataClosure() {
     }
 
     this.metaDocument = meta;
-    this.metadata = {};
+    this.metadata = Object.create(null);
     this.parse();
   }
 

src/display/svg.js

@@ -385,7 +385,7 @@ var SVGGraphics = (function SVGGraphicsClosure() {
     this.pendingEOFill = false;
 
     this.embedFonts = false;
-    this.embeddedFonts = {};
+    this.embeddedFonts = Object.create(null);
     this.cssStyle = null;
   }