GitLab

Updating the history state has been a surprisingly rich source of performance
bugs. This minimal page exemplifies them.

BUG=391158

Review URL: https://codereview.chromium.org/378803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282291 0039d316-1c4b-4281-b951-d872f2087c98