tree ebb17a38b122102c2998b156fd8161ee4a107f63
parent 84a80652752976c9abe42d28e467c362baff3e39
author msarett <msarett@google.com> 1447251687 -0800
committer Commit bot <commit-bot@chromium.org> 1447251687 -0800

Add an Allocator interface that indicates if memory is zero init

This is the first step in a three part change:
(1) Skia: Add SkBRDAllocator.
(2) Android: Make JavaPixelAllocator and RecyclingClippingPixelAllocator
             implement SkBRDAllocator.
(3) Skia: Change SkBitmapRegionDecoder to use SkBRDAllocator and take
          advantage of zero allocated memory when possible.

BUG=skia:

Review URL: https://codereview.chromium.org/1423253004