GitLab

We will limit the enhanced bookmark image store database size
to ensure that the db file size is reasonable. So add a function
to query the actual file size.

BUG=378853

Review URL: https://codereview.chromium.org/305963004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274297 0039d316-1c4b-4281-b951-d872f2087c98