use SkColorType instead of SkBitmap::Config in views/effects

R=scroggo@google.com, reed@google.com
TBR=scroggo

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/168843002

git-svn-id: http://skia.googlecode.com/svn/trunk@13469 2bbb7eff-a529-9590-31e7-b0007b416f81
19 files changed