Don't build sync_unit_tests for TSan/win

We don't run it yet it's slow and fails due to too-big PDB files on the bot
TBR=glider
Review URL: http://codereview.chromium.org/8816018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113192 0039d316-1c4b-4281-b951-d872f2087c98

build/all.gyp

@@ -488,7 +488,6 @@
           'type': 'none',
           'dependencies': [
             '../base/base.gyp:base_unittests',
-            '../chrome/chrome.gyp:sync_unit_tests',
             '../content/content.gyp:content_unittests',
             '../crypto/crypto.gyp:crypto_unittests',
             '../ipc/ipc.gyp:ipc_tests',