allow one zero length dash

bench/DashBench.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 "Benchmark.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 54 matching lines @@
     void onDraw(int loops, SkCanvas* canvas) override {
         SkPaint paint;
         this->setupPaint(&paint);
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeWidth(SkIntToScalar(fWidth));
         paint.setAntiAlias(false);
 
         SkPath path;
         this->makePath(&path);
 
-        paint.setPathEffect(SkDashPathEffect::Create(fIntervals.begin(),
-                                                     fIntervals.count(), 0))->unref();
+        SkAutoTUnref<SkPathEffect> effect(SkDashPathEffect::Create(fIntervals.begin(),
+                                          fIntervals.count(), 0));
+        paint.setPathEffect(effect);
 
         if (fDoClip) {
             SkRect r = path.getBounds();
             r.inset(-SkIntToScalar(20), -SkIntToScalar(20));
             // now move it so we don't intersect
             r.offset(0, r.height() * 3 / 2);
             canvas->clipRect(r);
         }
 
         this->handlePath(canvas, path, paint, loops);
@@ skipping 393 matching lines @@
 // hori_2 is just too slow to enable at the moment
 DEF_BENCH( return new GiantDashBench(GiantDashBench::kHori_LineType, 2); )
 DEF_BENCH( return new GiantDashBench(GiantDashBench::kVert_LineType, 2); )
 DEF_BENCH( return new GiantDashBench(GiantDashBench::kDiag_LineType, 2); )
 
 DEF_BENCH( return new DashGridBench(1, 1, true); )
 DEF_BENCH( return new DashGridBench(1, 1, false); )
 DEF_BENCH( return new DashGridBench(3, 1, true); )
 DEF_BENCH( return new DashGridBench(3, 1, false); )
 #endif