Mark temp paths in SkBaseDevice::drawArc and ::drawDRRect as volatile

src/core/SkDevice.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 "SkColorFilter.h"
 #include "SkDevice.h"
 #include "SkDraw.h"
@@ skipping 57 matching lines @@
                 geo = kUnknown_SkPixelGeometry;
             }
             break;
     }
     return geo;
 }
 
 void SkBaseDevice::drawArc(const SkDraw& draw, const SkRect& oval, SkScalar startAngle,
                            SkScalar sweepAngle, bool useCenter, const SkPaint& paint) {
     SkASSERT(SkScalarAbs(sweepAngle) >= 0.f && SkScalarAbs(sweepAngle) < 360.f);
-    SkPath  path;
+    SkPath path;
     if (useCenter) {
         path.moveTo(oval.centerX(), oval.centerY());
     }
     path.arcTo(oval, startAngle, sweepAngle, !useCenter);
     if (useCenter) {
         path.close();
     }
+    path.setIsVolatile(true);
     this->drawPath(draw, path, paint);
 }
 
 void SkBaseDevice::drawDRRect(const SkDraw& draw, const SkRRect& outer,
                               const SkRRect& inner, const SkPaint& paint) {
     SkPath path;
     path.addRRect(outer);
     path.addRRect(inner);
     path.setFillType(SkPath::kEvenOdd_FillType);
+    path.setIsVolatile(true);
 
     const SkMatrix* preMatrix = nullptr;
     const bool pathIsMutable = true;
     this->drawPath(draw, path, paint, preMatrix, pathIsMutable);
 }
 
 void SkBaseDevice::drawPatch(const SkDraw& draw, const SkPoint cubics[12], const SkColor colors[4],
                              const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) {
     SkPatchUtils::VertexData data;
 
@@ skipping 443 matching lines @@
 
     // Also log filter quality independent scale factor.
     SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.AnyFilterQuality", scaleFactor,
                              kLast_ScaleFactor + 1);
 
     // Also log an overall histogram of filter quality.
     SK_HISTOGRAM_ENUMERATION("FilterQuality", filterQuality, kLast_SkFilterQuality + 1);
 #endif
 }