[SyncFS] Refine create-create folder conflict handling.

BUG=

Review URL: https://codereview.chromium.org/101303002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239220 0039d316-1c4b-4281-b951-d872f2087c98
[Telemetry] Disable media_cns_cases on Android.

Linux is a casualty because we don't yet have a clean way to differentiate.

BUG=326154
NOTRY=True
TBR=shadi@chromium.org

Review URL: https://codereview.chromium.org/104653010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239221 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239220
SVN changes up to revision 239221
Adding tests for repeating timers with 0 delay.

R=mark@chromium.org

Review URL: https://codereview.chromium.org/105103002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239222 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239222