Reduce sizeof(SkPicture::Analysis) from 24 bytes to 2 bytes.

This saves "up to" 22 bytes per SkPicture.

Due to alignment, this reduces sizeof(SkPicture):
- from 88 to 72 bytes on Linux x64
- from 68 to 48 bytes on Android
(with Chrome's build settings)

It also somewhat simplifies the GPU veto logic.

BUG=skia:

[mtklein] No public API changes.
TBR=reed@google.com

Review URL: https://codereview.chromium.org/1060863004
2 files changed