Replace scaled bitmap if entry already exist in cache.

BUG=skia:2251
R=reed@google.com

Author: reveman@chromium.org

Review URL: https://codereview.chromium.org/185263009

git-svn-id: http://skia.googlecode.com/svn/trunk@13667 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed