Revert "Revert "add tiler for SkDraw""

This reverts commit 461ef7af88cc966007c464130a971ec86c803f1d.

Prev CL to SkScan_Hairline.cpp fixed the bug that caused the earlier revert.

Bug: skia:
Change-Id: Ifd9a364c7546175be292f726e19465b72196b45e
Reviewed-on: https://skia-review.googlesource.com/112723
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

• gm/hugepath.cpp[diff]
• gn/core.gni[diff]
• gn/tests.gni[diff]
• src/core/SkBitmapDevice.cpp[diff]
• src/core/SkBitmapDevice.h[diff]
• src/core/SkDeviceLooper.cpp[Deleted - diff]
• src/core/SkDeviceLooper.h[Deleted - diff]
• src/core/SkDraw.cpp[diff]
• tests/DeviceLooperTest.cpp[Deleted - diff]