GitLab

BUG=108853
TEST=AppApiTest.* and ExtensionBrowserTest.* no longer flaky


Review URL: https://chromiumcodereview.appspot.com/10412047

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@138503 0039d316-1c4b-4281-b951-d872f2087c98