Working patch to remove constant attributes.  This may cause some gm mismatches, I will rebaseline tonight.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/84c94c0dfd1e12e97d8a835882dda575f36e41d2

Review URL: https://codereview.chromium.org/678073005
Override SkCanvas::drawImage[Rect]() in SkProxyCanvas

BUG=skia:2947

Review URL: https://codereview.chromium.org/679293002
aa rect renderer takes a gpu on construction

BUG=skia:

Review URL: https://codereview.chromium.org/683483004
Revert of Update the Android NDK to r10c (patchset #1 id:1 of https://codereview.chromium.org/687603002/)

Reason for revert:
Spooky behavior on Nexus GPUs

Original issue's description:
> Update the Android NDK to r10c
>
> Committed: https://skia.googlesource.com/skia/+/a01a17b3f2f225d9499627e20f9b42ce351bd0eb

TBR=tomhudson@chromium.org,borenet@google.com,tomhudson@google.com,djsollen@google.com
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/685753003
Revert of Patch to remove constant attributes (patchset #8 id:120002 of https://codereview.chromium.org/678073005/)

Reason for revert:
I'll checkin tonight when the tree is quieter

Original issue's description:
> Working patch to remove constant attributes.  This may cause some gm mismatches, I will rebaseline tonight.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/84c94c0dfd1e12e97d8a835882dda575f36e41d2
>
> Committed: https://skia.googlesource.com/skia/+/95f5194abce19e8ed875f3495fd16c79a9b931b4

TBR=bsalomon@google.com,egdaniel@google.com,joshualitt@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/683203002