Minor bugs in Exif parser.

chrome/browser/resources/file_manager/js/exif_parser.js

 // Copyright (c) 2011 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.
 
 const EXIF_MARK_SOI = 0xffd8;  // Start of image data.
 const EXIF_MARK_SOS = 0xffda;  // Start of "stream" (the actual image data).
 const EXIF_MARK_EXIF = 0xffe1;  // Start of exif block.
 
 const EXIF_ALIGN_LITTLE = 0x4949;  // Indicates little endian exif data.
 const EXIF_ALIGN_BIG = 0x4d4d;  // Indicates big endian exif data.
@@ skipping 231 matching lines @@
   }
 
   switch (tag.format) {
     case 1: // Byte
     case 7: // Undefined
       safeRead(1);
       break;
 
     case 2: // String
       safeRead(1);
-      tag.value = tag.value.map(
-          function(v) { return String.fromCharCode(v) });
-      tag.value = tag.value.join('');
+      if (tag.componentCount == 1) {
+        tag.value = String.fromCharCode(tag.value);
+      } else {
+        tag.value = String.fromCharCode.apply(null, tag.value);
+      }
       break;
 
     case 3: // Short
       safeRead(2);
       break;
 
     case 4: // Long
       safeRead(4);
       break;
 
@@ skipping 18 matching lines @@
                 ': ' + tag.format);
       safeRead(4);
       break;
   }
 
   this.vlog('Read tag: 0x' + tag.id.toString(16) + '/' + tag.format + ': ' +
             tag.value);
 };
 
 MetadataDispatcher.registerParserClass(ExifParser);