SkPatchGrid interface (after SkPatch/SkPicture rebase).

src/utils/SkPatchUtils.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPatchUtils.h"
 
 // size in pixels of each partition per axis, adjust this knob
-static const int kPartitionSize = 15;
+static const int kPartitionSize = 25;
 
 /**
  * Calculate the approximate arc length given a bezier curve's control points.
  */
 static SkScalar approx_arc_length(SkPoint* points, int count) {
     if (count < 2) {
         return 0;
     }
     SkScalar arcLength = 0;
     for (int i = 0; i < count - 1; i++) {
@@ skipping 24 matching lines @@
     patch.getRightPoints(pts);
     matrix->mapPoints(pts, 4);
     SkScalar rightLength = approx_arc_length(pts, 4);
     
     // Level of detail per axis, based on the larger side between top and bottom or left and right
     int lodX = static_cast<int>(SkMaxScalar(topLength, bottomLength) / kPartitionSize);
     int lodY = static_cast<int>(SkMaxScalar(leftLength, rightLength) / kPartitionSize);
     
     return SkISize::Make(SkMax32(4, lodX), SkMax32(4, lodY));
 }