DevTools: Trim stylesheet URLs in the Styles sidebar to 30 characters

R=vsevik@chromium.org
BUG=252711

Review URL: https://codereview.chromium.org/16917007

git-svn-id: svn://svn.chromium.org/blink/trunk@152890 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove skia/windows line-height hack

Now that Skia has support for reporting font metrics calculated
using the same formula as we currently use for the GDI code path
this workaround is no longer needed.

BUG=252705
R=schenney@chromium.org

Review URL: https://chromiumcodereview.appspot.com/17553005

git-svn-id: svn://svn.chromium.org/blink/trunk@152891 bbb929c8-8fbe-4397-9dbb-9b2b20218538