Remove obsolete tag from a histogram that is still in use
During my update to histograms.xml in CL
https://chromiumcodereview.appspot.com/141803006/
I was overzealous, and marked a histogram as obsolete, despite
the fact that I proceeded to use that name as a base in a field trial.
This CL reverts that obsolete tag.


r=rtenneti
BUG=329255

Review URL: https://codereview.chromium.org/134163006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247087 0039d316-1c4b-4281-b951-d872f2087c98
host_context_ shouldn't be freed while the the disconnection task is still running on the network thread.

BUG=

Review URL: https://codereview.chromium.org/135653012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247088 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247088
Media Galleries API Scanning: Infrastructure for media scan, progress events.

BUG=161119

Review URL: https://codereview.chromium.org/135753007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247089 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247089