Add refcnting to SkClipStack on SkCanvas

src/gpu/GrDrawTarget.cpp

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDrawTarget.h"
 
@@ skipping 862 matching lines @@
     }
     fVertices = NULL;
     fIndices = NULL;
 }
 
 GrDrawTarget::AutoClipRestore::AutoClipRestore(GrDrawTarget* target, const SkIRect& newClip) {
     fTarget = target;
     fClip = fTarget->getClip();
     fStack.init();
     fStack.get()->clipDevRect(newClip, SkRegion::kReplace_Op);
-    fReplacementClip.fClipStack = fStack.get();
+    fReplacementClip.fClipStack.reset(SkRef(fStack.get()));
     target->setClip(&fReplacementClip);
 }
 
 namespace {
 // returns true if the read/written rect intersects the src/dst and false if not.
 bool clip_srcrect_and_dstpoint(const GrSurface* dst,
                                const GrSurface* src,
                                const SkIRect& srcRect,
                                const SkIPoint& dstPoint,
                                SkIRect* clippedSrcRect,
@@ skipping 350 matching lines @@
                              GrPipelineBuilder::AutoRestoreStencil* ars,
                              GrScissorState* scissorState,
                              const SkRect* devBounds) {
     return fClipMaskManager.setupClipping(pipelineBuilder,
                                           are,
                                           ars,
                                           scissorState,
                                           this->getClip(),
                                           devBounds);
 }