Revert of change all factories to return their base-class

include/effects/Sk2DPathEffect.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef Sk2DPathEffect_DEFINED
 #define Sk2DPathEffect_DEFINED
 
@@ skipping 37 matching lines @@
     // illegal
     Sk2DPathEffect(const Sk2DPathEffect&);
     Sk2DPathEffect& operator=(const Sk2DPathEffect&);
 
     friend class Sk2DPathEffectBlitter;
     typedef SkPathEffect INHERITED;
 };
 
 class SK_API SkLine2DPathEffect : public Sk2DPathEffect {
 public:
-    static SkPathEffect* Create(SkScalar width, const SkMatrix& matrix) {
+    static SkLine2DPathEffect* Create(SkScalar width, const SkMatrix& matrix) {
         return new SkLine2DPathEffect(width, matrix);
     }
 
     virtual bool filterPath(SkPath* dst, const SkPath& src,
                             SkStrokeRec*, const SkRect*) const override;
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLine2DPathEffect)
 
 protected:
     SkLine2DPathEffect(SkScalar width, const SkMatrix& matrix)
         : Sk2DPathEffect(matrix), fWidth(width) {}
     void flatten(SkWriteBuffer&) const override;
 
     void nextSpan(int u, int v, int ucount, SkPath*) const override;
 
 private:
     SkScalar fWidth;
 
     typedef Sk2DPathEffect INHERITED;
 };
 
 class SK_API SkPath2DPathEffect : public Sk2DPathEffect {
 public:
     /**
      *  Stamp the specified path to fill the shape, using the matrix to define
      *  the latice.
      */
-    static SkPathEffect* Create(const SkMatrix& matrix, const SkPath& path) {
+    static SkPath2DPathEffect* Create(const SkMatrix& matrix, const SkPath& path) {
         return new SkPath2DPathEffect(matrix, path);
     }
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath2DPathEffect)
 
 protected:
     SkPath2DPathEffect(const SkMatrix&, const SkPath&);
     void flatten(SkWriteBuffer&) const override;
 
     void next(const SkPoint&, int u, int v, SkPath*) const override;
 
 private:
     SkPath  fPath;
 
     typedef Sk2DPathEffect INHERITED;
 };
 
 #endif