Disable LauncherContextMenuTest.NewIncognitoWindowMenuIsDisabledWhenIncognitoModeOff
under DrMemory on Windows

BUG=336343
TBR=eugenis@chromium.org

Review URL: https://codereview.chromium.org/143883003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246003 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246003