Unskip http/tests/security/mixedContent/insecure-plugin-in-iframe.html.

This test doesn't appear to be flaky in the last many runs.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&tests=http%2Ftests%2Fsecurity%2FmixedContent%2Finsecure-plugin-in-iframe.html

TBR=ojan@chromium.org
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/23530038

git-svn-id: svn://svn.chromium.org/blink/trunk@157297 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Unskip http/tests/security/redirect-BLOCKED-to-localURL.html

This test hasn't failed in the last several runs: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&tests=http%2Ftests%2Fsecurity%2Fredirect-BLOCKED-to-localURL.html&showExpectations=true

BUG=231932
TBR=ojan@chromium.org
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/23766012

git-svn-id: svn://svn.chromium.org/blink/trunk@157298 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: recognize clicks on Timeline's category label in status bar

We used to only honor checkbox clicks, now we also process label clicks as well.
Drive-by: use createChild() to build DOM.

BUG=
R=loislo@chromium.org

Review URL: https://codereview.chromium.org/23880003

git-svn-id: svn://svn.chromium.org/blink/trunk@157299 bbb929c8-8fbe-4397-9dbb-9b2b20218538