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This implements connect, disconnect, getInfo, update, getControlSignals,
setControlSignals, flush, setPaused and getConnections.

BUG=389016

Review URL: https://codereview.chromium.org/423403002

Cr-Commit-Position: refs/heads/master@{#289578}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289578 0039d316-1c4b-4281-b951-d872f2087c98