Telemetry: Normalize fast-path results with frames.

This changes our unit from percentage-busy to ms-per-frame.
This should be less noisy to stalls where we are idle not
producing frames.

NOTRY=true
BUG=334063

No-try since this obviously doesn't break net-unittests.

Review URL: https://codereview.chromium.org/138923004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245301 0039d316-1c4b-4281-b951-d872f2087c98
Added privet storage list operation

Added PrivetJSONOperation to call /privet/storage/list.

BUG=332182

Review URL: https://codereview.chromium.org/138983002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245302 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245302