Implement File API

lib/io.js

 //
 // No direct file system access, using FileSystem API
 //
 
 var IO = exports.IO =
 {
   lineBreak: "\n",
 
   resolveFilePath: function(path)
   {
@@ skipping 23 matching lines @@
         for (var i = 0; i < lines.length; i++)
           listener.process(lines[i]);
         listener.process(null);
         callback(null);
       }
     });
   },
 
   writeToFile: function(file, encode, data, callback, timeLineID)
   {
-    var blob;
-    try
-    {
-      blob = new Blob([data.join(this.lineBreak) + this.lineBreak], {type: "text/plain"});
-    }
-    catch (e)
-    {
-      if (!(e instanceof TypeError))
-        throw e;
-
-      // Blob wasn't a constructor before Chrome 20
-      var builder = new (window.BlobBuilder || window.WebKitBlobBuilder);
-      builder.append(data.join(this.lineBreak) + this.lineBreak);
-      blob = builder.getBlob("text/plain");
-    }
-
-    _fileSystem.write(file, blob, callback);
+    var content = data.join(this.lineBreak) + this.lineBreak;
+    _fileSystem.write(file, content, callback);
   },
 
   copyFile: function(fromFile, toFile, callback)
   {
     // Simply combine read and write operations
     var data = [];
     this.readFromFile(fromFile, false, {
       process: function(line)
       {
         if (line !== null)
@@ skipping 16 matching lines @@
   removeFile: function(file, callback)
   {
     _fileSystem.remove(file, callback);
   },
 
   statFile: function(file, callback)
   {
     _fileSystem.stat(file, callback);
   }
 };