Adding SkDeferredCanvas::NoticifationClient to the exported API.

R=reed@android.com, robertphillips@google.com, reed, robertphillips
BUG=1861

Author: schenney@chromium.org

Review URL: https://codereview.chromium.org/83383007

git-svn-id: http://skia.googlecode.com/svn/trunk@12380 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed