Disabling ExtensionPrefStoreTest on valgrind bot as they have memory leak.
 Please revert this once you fix this problem.

TBR=pam@chromium.org
BUG=48980
TEST=none

Review URL: http://codereview.chromium.org/2985005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@52192 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed