Remove global window and navigator usages from the core code.

Author: yurydelendik

examples/node/domstubs.js

@@ -120,10 +120,6 @@ DOMElement.prototype = {
   },
 }
 
-global.window = global;
-
-global.navigator = { userAgent: 'node' };
-
 global.document = {
   childNodes : [],
 

src/display/api.js

@@ -2002,7 +2002,7 @@ var InternalRenderTask = (function InternalRenderTaskClosure() {
     },
 
     _scheduleNext: function InternalRenderTask__scheduleNext() {
-      if (this.useRequestAnimationFrame) {
+      if (this.useRequestAnimationFrame && typeof window !== 'undefined') {
         window.requestAnimationFrame(this._nextBound);
       } else {
         Promise.resolve(undefined).then(this._nextBound);

src/display/font_loader.js

@@ -308,19 +308,20 @@ FontLoader.isFontLoadingAPISupported = typeof document !== 'undefined' &&
 //#if !(MOZCENTRAL || CHROME)
 Object.defineProperty(FontLoader, 'isSyncFontLoadingSupported', {
   get: function () {
+    if (typeof navigator === 'undefined') {
+      // node.js - we can pretend sync font loading is supported.
+      return shadow(FontLoader, 'isSyncFontLoadingSupported', true);
+    }
+
     var supported = false;
 
     // User agent string sniffing is bad, but there is no reliable way to tell
     // if font is fully loaded and ready to be used with canvas.
-    var userAgent = window.navigator.userAgent;
-    var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
+    var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(navigator.userAgent);
     if (m && m[1] >= 14) {
       supported = true;
     }
     // TODO other browsers
-    if (userAgent === 'node') {
-      supported = true;
-    }
     return shadow(FontLoader, 'isSyncFontLoadingSupported', supported);
   },
   enumerable: true,
@@ -378,8 +379,7 @@ var FontFaceObject = (function FontFaceObjectClosure() {
       var fontName = this.loadedName;
 
       // Add the font-face rule to the document
-      var url = ('url(data:' + this.mimetype + ';base64,' +
-                 window.btoa(data) + ');');
+      var url = ('url(data:' + this.mimetype + ';base64,' + btoa(data) + ');');
       var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
 
       if (this.options.fontRegistry) {

src/frameworks.js

@@ -20,7 +20,7 @@
 'use strict';
 
 var useRequireEnsure = false;
-if (typeof module !== 'undefined' && module.require) {
+if (typeof window === 'undefined') {
   // node.js - disable worker and set require.ensure.
   isWorkerDisabled = true;
   if (typeof require.ensure === 'undefined') {