Disable flaky DelegatedFrameResourceCollectionTest.Thread

BUG=313441
TBR=danakj

Review URL: https://codereview.chromium.org/53553002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231939 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231939