Fix two leaks & improve leak tracking

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 "GrEffect.h"
@@ skipping 268 matching lines @@
 
 GrEffectRef* EllipseEdgeEffect::TestCreate(SkMWCRandom* random,
                                            GrContext* context,
                                            const GrDrawTargetCaps&,
                                            GrTexture* textures[]) {
     return EllipseEdgeEffect::Create(random->nextBool());
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
+void GrOvalRenderer::reset() {
+    GrSafeSetNull(fRRectIndexBuffer);
+}
+
 bool GrOvalRenderer::drawOval(GrDrawTarget* target, const GrContext* context, bool useAA,
                               const GrRect& oval, const SkStrokeRec& stroke)
 {
     if (!useAA) {
         return false;
     }
 
     const SkMatrix& vm = context->getMatrix();
 
     // we can draw circles
@@ skipping 547 matching lines @@
         }
 
         // drop out the middle quad if we're stroked
         int indexCnt = isStroked ? GR_ARRAY_COUNT(gRRectIndices)-6 : GR_ARRAY_COUNT(gRRectIndices);
         target->setIndexSourceToBuffer(indexBuffer);
         target->drawIndexed(kTriangles_GrPrimitiveType, 0, 0, 16, indexCnt, &bounds);
     }
 
     return true;
 }