Make the commit log separately scrollable.
Make the commit log separately scrollable.

BUG=skia:
R=mtklein@google.com
TBR=mtklein

Author: jcgregorio@google.com

Review URL: https://codereview.chromium.org/493693002

google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot