Consolidate handling of infinitely thin primitives and aa bloat handing WRT batch bounds

src/gpu/batches/GrDrawPathBatch.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawPathBatch_DEFINED
 #define GrDrawPathBatch_DEFINED
 
@@ skipping 60 matching lines @@
 
     const char* name() const override { return "DrawPath"; }
 
     SkString dumpInfo() const override;
 
 private:
     GrDrawPathBatch(const SkMatrix& viewMatrix, GrColor color, GrPathRendering::FillType fill,
                     const GrPath* path)
         : INHERITED(ClassID(), viewMatrix, color, fill)
         , fPath(path) {
-        fBounds = path->getBounds();
-        viewMatrix.mapRect(&fBounds);
+        this->setTransformedBounds(path->getBounds(), viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);
     }
 
     bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { return false; }
 
     void onDraw(GrBatchFlushState* state) override;
 
     GrPendingIOResource<const GrPath, kRead_GrIOType> fPath;
 
     typedef GrDrawPathBatchBase INHERITED;
 };
@@ skipping 102 matching lines @@
 
     PendingPathRange    fPathRange;
     DrawList            fDraws;
     int                 fTotalPathCount;
     SkScalar            fScale;
 
     typedef GrDrawPathBatchBase INHERITED;
 };
 
 #endif