[M52][NTP Snippets] Stop fetching snippets when disabled.
[M52][NTP Snippets] Stop fetching snippets when disabled.

NOTRY=true
NOPRESUBMIT=true
R=treib@chromium.org, bauerb@chromium.org
TBR=kerz@chromium.org

BUG=625839

Review-Url: https://codereview.chromium.org/2128433002
Cr-Commit-Position: 03d981dee550804c6934fd1a1d9cfa3c172affd3@{#584}
Cr-Branched-From: e9621a186760eb36d74098d9e33e4dd91c427b34@{#394939}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk