Add suppressions for new reports on the WebKit bot
Also, remove suppressions for a few bugs that got fixed lately

BUG=330846,330870,330870,331061,331063
TBR=bruening
NOTRY=true

Review URL: https://codereview.chromium.org/122323002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242723 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242723