Turn on quilt mode in DM.

Turn on quilt mode in DM.
  - Rename TileGrid -> Quilt to avoid the name overload.
  - Tag all failing GMs with kSkipTiled_Flag.

You may be wondering, do any GMs pass?  Yes, some do!  And that trends towards all of them as we increase --quiltTile.

Two GMs only fail in --quilt mode in 565.  Otherwise all GMs which fail are skipped, and those which don't fail aren't. (The 8888 variants of those two GMs are skipped even though they pass.)

BUG=skia:2477
Committed: http://code.google.com/p/skia/source/detail?r=14457

[reed1, 2014-04-30 12:11:54]

What is the tolerance for "passing"? Is that settable so we can sort the failing
gms, to know which are the biggest offenders?

lgtm

[mtklein, 2014-04-30 12:22:44]

On 2014/04/30 12:11:54, reed1 wrote:
> What is the tolerance for "passing"? Is that settable so we can sort the
failing
> gms, to know which are the biggest offenders?
> 
> lgtm

Tolerance for passing is pixel-perfect, which we can of course tweak.

Temporarily switching QuiltTask::shouldSkip() to  { return false; } will run
everything, and with -w and skdiff we can sort them by badness.

[mtklein, 2014-04-30 12:22:56]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-04-30 12:23:06]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/256373002/170001

[commit-bot: I haz the power, 2014-04-30 13:21:36]

Change committed as 14457