Remove offset to SkMallocPixelRef::NewWithData - use SkData::NewSubset instead.

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

Author: halcanary@google.com

Review URL: https://codereview.chromium.org/243483002

git-svn-id: http://skia.googlecode.com/svn/trunk@14289 2bbb7eff-a529-9590-31e7-b0007b416f81
4 files changed