Return null in getLocationInfo for Drive files outside of virtual mount points.

TEST=Tested manually, by setting the downloads directory to Drive, and then trying to install an unpacked extension.
BUG=340925

Review URL: https://codereview.chromium.org/132633007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248925 0039d316-1c4b-4281-b951-d872f2087c98
Clean-up: Replaces obsolete Font/FontList methods.

Replaces obsolete methods of gfx::Font and gfx::FontList with new ones.

BUG=265485
TEST=none

Review URL: https://codereview.chromium.org/140693017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248926 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248926