Factor out a BaseContext from JsContext.

BUG=skia:
R=robertphillips@google.com

Author: jcgregorio@google.com

Review URL: https://codereview.chromium.org/186783004

git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@13660 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed