fix memory leak

src/gpu/GrOvalRenderer.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrOvalRenderer.h"
 
 #include "gl/builders/GrGLProgramBuilder.h"
@@ skipping 442 matching lines @@
                                                      GrContext* context,
                                                      const GrDrawTargetCaps&,
                                                      GrTexture* textures[]) {
     return DIEllipseEdgeEffect::Create((Mode)(random->nextRangeU(0,2)));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrOvalRenderer::reset() {
     SkSafeSetNull(fRRectIndexBuffer);
+    SkSafeSetNull(fStrokeRRectIndexBuffer);
 }
 
 bool GrOvalRenderer::drawOval(GrDrawTarget* target, const GrContext* context, bool useAA,
                               const SkRect& oval, const SkStrokeRec& stroke)
 {
     bool useCoverageAA = useAA &&
         !target->getDrawState().getRenderTarget()->isMultisampled() &&
         !target->shouldDisableCoverageAAForBlend();
 
     if (!useCoverageAA) {
@@ skipping 760 matching lines @@
         // drop out the middle quad if we're stroked
         int indexCnt = isStrokeOnly ? SK_ARRAY_COUNT(gRRectIndices) - 6 :
                                       SK_ARRAY_COUNT(gRRectIndices);
         target->setIndexSourceToBuffer(indexBuffer);
         target->drawIndexedInstances(kTriangles_GrPrimitiveType, 1, 16, indexCnt, &bounds);
     }
 
     target->resetIndexSource();
     return true;
 }