Add fontconfig to linux DEPS for embedded builds (reland)

We'll use this in-tree fontconfig when "embedded=1" is set in GYP_DEFINES.

This was reverted pending license checker changes (landed as r127213003).

Relanding with the following changes from the third_party HOWTO:
  - Added OWNERS file
  - Updated .gitignore

BUG=318315

Review URL: https://codereview.chromium.org/133903005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244318 0039d316-1c4b-4281-b951-d872f2087c98
Removes a couple of conflicting files from build

BUG=none
TEST=none
R=ben@chromium.org

Review URL: https://codereview.chromium.org/134043003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244322 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244323 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244323
Fix for testing existence of oobe in login code.

We were using GetOobe to figure out if the oobe page existed. This creates an InspectorBackend, which creates an InspectorPage, which calls _EnablePageNotifications, which calls SyncRequest with a timeout of 60 sec. If the page goes away right before SyncRequest is called, we could end up waiting 60 sec.

In general, GetOobe is too expensive if all we're interested in is checking the existence of oobe, so fix all instances of such checks to use OobeExists instead.

BUG=331940
TEST=manual
NOTRY=True

Review URL: https://codereview.chromium.org/134043005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244325 0039d316-1c4b-4281-b951-d872f2087c98
Roll FFmpeg DEPS.

Pulls in the following patches:
172513a Linux: upstream Gentoo Linux patches:
cfe978e Remove trailing periods from rule messages.

BUG=none
TEST=none
TBR=thakis

Review URL: https://codereview.chromium.org/134333004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244326 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244327 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244327