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

src/gpu/batches/GrTessellatingPathRenderer.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTessellatingPathRenderer.h"
 
 #include "GrAuditTrail.h"
@@ skipping 220 matching lines @@
                           const SkRect& clipBounds)
       : INHERITED(ClassID())
       , fColor(color)
       , fShape(shape)
       , fViewMatrix(viewMatrix) {
         const SkRect& pathBounds = shape.bounds();
         fClipBounds = clipBounds;
         // Because the clip bounds are used to add a contour for inverse fills, they must also
         // include the path bounds.
         fClipBounds.join(pathBounds);
-        if (shape.inverseFilled()) {
-            fBounds = fClipBounds;
-        } else {
-            fBounds = pathBounds;
-        }
-        viewMatrix.mapRect(&fBounds);
+        const SkRect& srcBounds = shape.inverseFilled() ? fClipBounds : pathBounds;
+        this->setTransformedBounds(srcBounds, viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);
     }
 
     GrColor                 fColor;
     GrShape                 fShape;
     SkMatrix                fViewMatrix;
     SkRect                  fClipBounds; // in source space
     GrXPOverridesForBatch   fPipelineInfo;
 
     typedef GrVertexBatch INHERITED;
 };
@@ skipping 43 matching lines @@
     vmi.mapRect(&clipBounds);
     GrStyle style;
     do {
         GrTest::TestStyle(random, &style);
     } while (style.strokeRec().isHairlineStyle());
     GrShape shape(path, style);
     return TessellatingPathBatch::Create(color, shape, viewMatrix, clipBounds);
 }
 
 #endif