Disable DevToolsSanityTest.TestPauseWhenLoadingDevTools on all platforms for flakiness.

BUG=329036
TBR=yurys@chromium.org

Review URL: https://codereview.chromium.org/118093002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241534 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241534