Don't take a ref on GP in AutoEffectRestore.

src/gpu/GrDrawState.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawState_DEFINED
 #define GrDrawState_DEFINED
 
@@ skipping 238 matching lines @@
      * significant complexity to the multi-ref architecture for deferred drawing. Once GrDrawState
      * and GrOptDrawState are fully separated then GrDrawState will never be in the deferred
      * execution state and GrOptDrawState always will be (and will be immutable and therefore
      * unable to have an ARE). At this point we can restore sanity and have the ARE save and restore
      * the GP.
      */
     class AutoRestoreEffects : public ::SkNoncopyable {
     public:
         AutoRestoreEffects() 
             : fDrawState(NULL)
-            , fOriginalGP(NULL)
+            , fOriginalGPID(SK_InvalidUniqueID)
             , fColorEffectCnt(0)
             , fCoverageEffectCnt(0) {}
 
         AutoRestoreEffects(GrDrawState* ds)
             : fDrawState(NULL)
-            , fOriginalGP(NULL)
+            , fOriginalGPID(SK_InvalidUniqueID)
             , fColorEffectCnt(0)
             , fCoverageEffectCnt(0) {
             this->set(ds);
         }
 
         ~AutoRestoreEffects() { this->set(NULL); }
 
         void set(GrDrawState* ds);
 
         bool isSet() const { return NULL != fDrawState; }
 
     private:
         GrDrawState*    fDrawState;
-        const GrEffect* fOriginalGP;
+        uint32_t        fOriginalGPID;
         int             fColorEffectCnt;
         int             fCoverageEffectCnt;
     };
 
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name Blending
     ////
 
@@ skipping 274 matching lines @@
     // Some of the auto restore objects assume that no effects are removed during their lifetime.
     // This is used to assert that this condition holds.
     SkDEBUGCODE(int fBlockEffectRemovalCnt;)
 
     void internalSetVertexAttribs(const GrVertexAttrib attribs[], int count, size_t stride);
 
     typedef GrRODrawState INHERITED;
 };
 
 #endif