Add a test for ITunesDataProvider (try two).

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 80b28d2874928353ca2efdc3c87680d7256d38b8..2c54fb6b73f034ffae960535a2e251c0c69188c8 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -2008,6 +2008,11 @@
             'browser/printing/cloud_print/test/cloud_print_policy_browsertest.cc',
           ],
         }],
+        ['OS=="mac" or OS=="win"', {
+          'sources': [
+            'browser/media_galleries/fileapi/itunes_data_provider_browsertest.cc',
+          ],
+        }],
         ['os_posix == 0 or chromeos == 1', {
           'sources!': [
             'common/time_format_browsertest.cc',