Revert of Generate Signed Distance Field directly from vector path

src/gpu/GrDistanceFieldGenFromVector.h

-/*
- * Copyright 2016 ARM Ltd.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDistanceFieldGenFromVector_DEFINED
-#define GrDistanceFieldGenFromVector_DEFINED
-
-#include "SkDistanceFieldGen.h"
-#include "SkPath.h"
-#include "SkMatrix.h"
-
-/** Given a vector path, generate the associated distance field.
-
- *  @param distanceField     The distance field to be generated. Should already be allocated
- *                           by the client with the padding defined in "SkDistanceFieldGen.h".
- *  @param path              The path we're using to generate the distance field.
- *  @param matrix            Transformation matrix for path.
- *  @param width             Width of the distance field.
- *  @param height            Height of the distance field.
- *  @param rowBytes          Size of each row in the distance field, in bytes.
- */
-bool GrGenerateDistanceFieldFromPath(unsigned char* distanceField,
-                                     const SkPath& path, const SkMatrix& viewMatrix,
-                                     int width, int height, size_t rowBytes);
-
-#endif