Add minimum timeout for transient errors

Add minimum timeout for privet transient errors, so that when printers give a
zero timeout, Chrome still waits between retries.

NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/69393003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235649 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235649
Fixed location for debug logs.

Current location is obtained from user prefs.
In addition, s/Value::CreateStringValue/new SringValue/g.

BUG=296501
TEST=manual tests on Falco.

Review URL: https://codereview.chromium.org/68573005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235650 0039d316-1c4b-4281-b951-d872f2087c98
Enable notification collapse-expand under a flag.

This fixes a layout bug that was dormant since previously notifications
were always expanded.

BUG=NONE

Review URL: https://codereview.chromium.org/68713006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235651 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235651