Enable App List Sync by default

BUG=305024
For chrome/browser/sync

R=jennyz@chromium.org, tapted@chromium.org
TBR=zea@chromium.org

Review URL: https://codereview.chromium.org/187813006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255982 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255982
Make GetUserName() return more specific error code, so that we could know how the function failed.

However, a lot user at under version 33 or lower, which means they don't auto-update Chrome? I'm not sure if this new piece of code will get to the affected users. 

BUG=334675

Review URL: https://codereview.chromium.org/177843009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255985 0039d316-1c4b-4281-b951-d872f2087c98
Gather histogram for received packets indicating losses.


Gather separate histograms for for first 100 received, and for missing (NACKed) packets.
We should be able to take the ratio, and see any correlation of packet loss with position
in the server transmitted stream.
r=rch
BUG=349314

Review URL: https://codereview.chromium.org/180833004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255986 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255986