GitLab

The updater now pulls BUG= lines out of the git log and 
processes/sorts/uniqifies them and prints them for even better 
commit messages.

Picked up changes:
6ef4764 Extend visibility checks to images that are extracted.
6e8c385 Updated Boilerpipe with some more modern tags.
cde81dc Add extract_text_only option
0a31800 filter out invisible elements
82b35ba Fix crash when content extraction fails.

BUG=354157,356336,362085,364356,367243

Review URL: https://codereview.chromium.org/297563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271582 0039d316-1c4b-4281-b951-d872f2087c98