Reland of change all factories to return their base-class (patchset #1 id:1 of https://codereview.chromium.org/1540203002/ )

Reason for revert:
chrome changes have landed

Original issue's description:
> Revert of change all factories to return their base-class (patchset #1 id:1 of https://codereview.chromium.org/1535353002/ )
>
> Reason for revert:
> need to update some chrome/blink call-sites
>
> Original issue's description:
> > change all factories to return their base-class
> >
> > will watch DEPS roll to see if there are chrome sites needing updates
> >
> > BUG=skia:
> > GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1535353002
> >
> > TBR=
> >
> > Committed: https://skia.googlesource.com/skia/+/d63f60a36327e9580861205ebb35cade8c49bd34
>
> TBR=
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/2d6ba6690f8951e152d8e793191b14afd52f5506

TBR=
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1533373002
diff --git a/tests/PictureTest.cpp b/tests/PictureTest.cpp
index fdb2de4..86c791a 100644
--- a/tests/PictureTest.cpp
+++ b/tests/PictureTest.cpp
@@ -146,7 +146,7 @@
         path.lineTo(50, 50);
 
         SkScalar intervals[] = { 1.0f, 1.0f };
-        SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(intervals, 2, 0));
+        SkAutoTUnref<SkPathEffect> dash(SkDashPathEffect::Create(intervals, 2, 0));
 
         SkPaint paint;
         paint.setStyle(SkPaint::kStroke_Style);