gfx: Use SkMatrix44 helpers instead of accessing its bitflags.

gfx: Use SkMatrix44 helpers instead of accessing its bitflags.

IsIdentityOrTranslation, IsScaleOrTranslation, and HasPerspective
are now provided by SkMatrix44 so use those.

R=vollick
BUG=408710
Committed: https://crrev.com/670a4abf8d79ed3d4071aa1f5cf775cf77a75a94
Cr-Commit-Position: refs/heads/master@{#295766}

[Ian Vollick, 2014-09-19 19:07:33]

On 2014/09/19 18:29:27, danakj wrote:

love it. lgtm.

[Ian Vollick, 2014-09-19 19:07:36]

The CQ bit was checked by vollick@chromium.org

[commit-bot: I haz the power, 2014-09-19 19:08:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/590553002/1

[commit-bot: I haz the power, 2014-09-19 19:38:36]

Committed patchset #1 (id:1) as aced27d05d83d82c1f0c4d575ab7b1169b9cb206

[commit-bot: I haz the power, 2014-09-19 19:39:38]

Patchset 1 (id:??) landed as
https://crrev.com/670a4abf8d79ed3d4071aa1f5cf775cf77a75a94
Cr-Commit-Position: refs/heads/master@{#295766}