removing setVertexArraySource from drawtarget

BUG=skia:

Review URL: https://codereview.chromium.org/699733002
Roll common to d7c2e2b9464.

Picks up code removal and changes to download_file.

https://skia.googlesource.com/common.git/+log/5eee100ab..d7c2e2b9464

Review URL: https://codereview.chromium.org/700763003
Enable distance field path rendering in Chrome.

- Add stat tracking for df-renderable paths
- Modify GPU rasterization veto to account for df-renderable paths
- Remove #define hiding df paths from Chromium and Android

BUG=skia:2935

Review URL: https://codereview.chromium.org/685113003
Include SkTypes so that SK_SUPPORT_GPU is meaningful.

For the Android framework build, we get our defines from
SkUserConfig, rather than from the makefile, so we need to
include it (via SkTypes) before we can use our defines.

Fixes Android framework build.

Review URL: https://codereview.chromium.org/700893002
Fix PictureTest for new GPU veto

NOTREECHECKS=true

Review URL: https://codereview.chromium.org/702733002