Adjust tolerance to fix GPU hairline curve issues

src/gpu/GrAAHairLinePathRenderer.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAAHairLinePathRenderer.h"
 
 #include "GrBatch.h"
@@ skipping 153 matching lines @@
     } else {
         dst[0] = dstTemp[0];
     }
     return conicCnt;
 }
 
 // returns 0 if quad/conic is degen or close to it
 // in this case approx the path with lines
 // otherwise returns 1
 static int is_degen_quad_or_conic(const SkPoint p[3], SkScalar* dsqd) {
-    static const SkScalar gDegenerateToLineTol = SK_Scalar1;
+    static const SkScalar gDegenerateToLineTol = GrPathUtils::kDefaultTolerance;
     static const SkScalar gDegenerateToLineTolSqd =
         SkScalarMul(gDegenerateToLineTol, gDegenerateToLineTol);
 
     if (p[0].distanceToSqd(p[1]) < gDegenerateToLineTolSqd ||
         p[1].distanceToSqd(p[2]) < gDegenerateToLineTolSqd) {
         return 1;
     }
 
     *dsqd = p[1].distanceToLineBetweenSqd(p[0], p[2]);
     if (*dsqd < gDegenerateToLineTolSqd) {
@@ skipping 869 matching lines @@
     GrColor color = GrRandomColor(random);
     SkMatrix viewMatrix = GrTest::TestMatrix(random);
     GrStrokeInfo stroke(SkStrokeRec::kHairline_InitStyle);
     SkPath path = GrTest::TestPath(random);
     SkIRect devClipBounds;
     devClipBounds.setEmpty();
     return create_hairline_batch(color, viewMatrix, path, stroke, devClipBounds);
 }
 
 #endif