remove 'deprecated' region from SkDraw

src/core/SkDraw.cpp

 /*
  * 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.
  */
 #define __STDC_LIMIT_MACROS
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
@@ skipping 1947 matching lines @@
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifdef SK_DEBUG
 
 void SkDraw::validate() const {
     SkASSERT(fMatrix != nullptr);
-    SkASSERT(fClip != nullptr);
     SkASSERT(fRC != nullptr);
 
     const SkIRect&  cr = fRC->getBounds();
     SkIRect         br;
 
     br.set(0, 0, fDst.width(), fDst.height());
     SkASSERT(cr.isEmpty() || br.contains(cr));
 }
 
 #endif
@@ skipping 55 matching lines @@
 
     SkRasterClip    clip;
     SkMatrix        matrix;
     SkPaint         paint;
 
     clip.setRect(SkIRect::MakeWH(mask.fBounds.width(), mask.fBounds.height()));
     matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft),
                         -SkIntToScalar(mask.fBounds.fTop));
 
     draw.fRC        = &clip;
-    draw.fClip      = &clip.bwRgn();
     draw.fMatrix    = &matrix;
     paint.setAntiAlias(true);
     paint.setStyle(style);
     draw.drawPath(devPath, paint);
 }
 
 bool SkDraw::DrawToMask(const SkPath& devPath, const SkIRect* clipBounds,
                         const SkMaskFilter* filter, const SkMatrix* filterMatrix,
                         SkMask* mask, SkMask::CreateMode mode,
                         SkPaint::Style style) {
@@ skipping 13 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }