GitLab

implementation thereof for desktop platforms. It also provides a stub
Android implementation, to be fleshed out in subsequent patches.

BUG=350384
TEST=existing tests
TBR=pavely@chromium.org for updates to invalidation tests

Review URL: https://codereview.chromium.org/278493002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273977 0039d316-1c4b-4281-b951-d872f2087c98