Remove GrContext from GrClipMaskCache

src/gpu/GrDrawTarget.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawTarget_DEFINED
 #define GrDrawTarget_DEFINED
 
@@ skipping 311 matching lines @@
     bool                                                            fFlushing;
 
     typedef SkRefCnt INHERITED;
 };
 
 /*
  * This class is JUST for clip mask manager.  Everyone else should just use draw target above.
  */
 class GrClipTarget : public GrDrawTarget {
 public:
-    GrClipTarget(GrContext* context)
-        : INHERITED(context) {
-        fClipMaskManager.setClipTarget(this);
-    }
+    GrClipTarget(GrContext*);
 
     /* Clip mask manager needs access to the context.
      * TODO we only need a very small subset of context in the CMM.
      */
     GrContext* getContext() { return INHERITED::getContext(); }
     const GrContext* getContext() const { return INHERITED::getContext(); }
 
     /**
      * Clip Mask Manager(and no one else) needs to clear private stencil bits.
      * ClipTarget subclass sets clip bit in the stencil buffer. The subclass
      * is free to clear the remaining bits to zero if masked clears are more
      * expensive than clearing all bits.
      */
     virtual void clearStencilClip(const SkIRect& rect, bool insideClip, GrRenderTarget* = NULL) = 0;
 
     /**
      * Release any resources that are cached but not currently in use. This
      * is intended to give an application some recourse when resources are low.
      */
-    void purgeResources() override {
-        // The clip mask manager can rebuild all its clip masks so just
-        // get rid of them all.
-        fClipMaskManager.purgeResources();
-    };
+    void purgeResources() override;
 
 protected:
-    GrClipMaskManager           fClipMaskManager;
+    SkAutoTDelete<GrClipMaskManager> fClipMaskManager;
 
 private:
-    GrClipMaskManager* clipMaskManager() override { return &fClipMaskManager; }
+    GrClipMaskManager* clipMaskManager() override { return fClipMaskManager; }
 
     virtual bool setupClip(GrPipelineBuilder*,
                            GrPipelineBuilder::AutoRestoreFragmentProcessors*,
                            GrPipelineBuilder::AutoRestoreStencil*,
                            GrScissorState* scissorState,
                            const SkRect* devBounds) override;
 
     typedef GrDrawTarget INHERITED;
 };
 
 #endif