Revert "Disable MediaGalleriesPlatformAppBrowserTest.PicasaCustomLocation"

This reverts commit 8c17956d30519442646975155e27d6a5be31919c.

Better than even odds that this patch fixed the underlying issue:

https://codereview.chromium.org/57423008/

BUG=315246
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/61893024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235535 0039d316-1c4b-4281-b951-d872f2087c98
Implement Windows character extent and scrolling methods.

This should be pretty straightforward - the logic is all
implemented and tested in cross-platform code, this just
hooks it up.

BUG=98977

Review URL: https://codereview.chromium.org/61963003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235536 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235535
SVN changes up to revision 235536