GitLab

ExternalProtocolHandler::GetBlockState queries for a value in a dict
pref. Previously, it was using DictionaryPrefUpdate to get the
dict. This causes the pref file to be written out in its dtor. This CL
switches to ordinary read-only ops to avoid spurious pref file writes.

BUG=none
R=benwells@chromium.org

Change-Id: I9a42441cdee70e7bd9b0f67afefb67d411bef2dd
Reviewed-on: https://chromium-review.googlesource.com/c/1298715Reviewed-by: Ben Wells <benwells@chromium.org>
Commit-Queue: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603041}