Revert "Remove kLogPluginMessages flag as part of flag cleanup."

This reverts commit da22c3c95242b05675da6b5e452c5dad8c5db1ee.

[email protected]
BUG=364781

Review URL: https://codereview.chromium.org/268783004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268268 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed