Disable all the tests that are flaking more than 5% on ChromeOS builders.

Data from http://chromium-build-logs.appspot.com/flakiness_dashboard?master=chromium.chromiumos.

BUG=386891,396494,396496,396497,396499,396501,396502,396504,396505,393208,223888,396506,387045,396507,396509,396510
R=viettrungluu@chromium.org
TBR=sky, stevenjb

Review URL: https://codereview.chromium.org/407073010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284938 0039d316-1c4b-4281-b951-d872f2087c98
15 files changed