mac: Fix a history swiper bug with magic mouse.

Canceling a history swipe with the magic mouse would fail to hide the swipe
arrow. Previously, the arrow was dismissed in `dealloc`, and I moved the
animation to `dismiss` in a previous change (107343008). Unfortunately, the
logic for magic mouse history swiping was failing to call `dismiss` if the
history swipe was cancelled.

BUG=330312

Review URL: https://codereview.chromium.org/115693012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243417 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243417
Fixup source locations for third_party/fontconfig

The fontconfig repository moved to from third_party/fontconfig to third_party/fontconfig/src.

TBR=darin@chromium.org
NOTRY=true
BUG=318315

Review URL: https://codereview.chromium.org/126823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243418 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243418