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:

Review URL: https://codereview.chromium.org/1540203002
diff --git a/tests/DashPathEffectTest.cpp b/tests/DashPathEffectTest.cpp
index f55bcf8..6639ec7 100644
--- a/tests/DashPathEffectTest.cpp
+++ b/tests/DashPathEffectTest.cpp
@@ -18,7 +18,7 @@
     SkScalar intervals[] = { 1.76934361e+36f, 2.80259693e-45f };  // Values from bug.
     const int count = 2;
     SkScalar phase = SK_ScalarInfinity;  // Used to force the bad fInitialDashLength = -1 path.
-    SkAutoTUnref<SkPathEffect> dash(SkDashPathEffect::Create(intervals, count, phase));
+    SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(intervals, count, phase));
 
     // nullptr -> refuses to work with flattening framework.
     REPORTER_ASSERT(r, dash->getFactory() != nullptr);
@@ -33,7 +33,7 @@
 
     const SkScalar intervals[] = { 1.0f, 1.0f };
     const int count = 2;
-    SkAutoTUnref<SkPathEffect> dash(SkDashPathEffect::Create(intervals, count, 0.0f));
+    SkAutoTUnref<SkDashPathEffect> dash(SkDashPathEffect::Create(intervals, count, 0.0f));
 
     SkRect cull = SkRect::MakeWH(1.0f, 1.0f);