Convert child FPs from refs to pending executions when parent converts

include/gpu/GrFragmentProcessor.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrFragmentProcessor_DEFINED
 #define GrFragmentProcessor_DEFINED
 
@@ skipping 108 matching lines @@
 
     /**
      * Subclass implements this to support getConstantColorComponents(...).
      *
      * Note: it's up to the subclass implementation to do any recursive call to compute the child
      * procs' output invariants; computeInvariantOutput will not be recursive.
      */
     virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const = 0;
 
 private:
+    void notifyRefCntIsZero() const final;
+
     /** Returns a new instance of the appropriate *GL* implementation class
         for the given GrFragmentProcessor; caller is responsible for deleting
         the object. */
     virtual GrGLFragmentProcessor* onCreateGLInstance() const = 0;
 
     /** Implemented using GLFragmentProcessor::GenKey as described in this class's comment. */
     virtual void onGetGLProcessorKey(const GrGLSLCaps& caps,
                                      GrProcessorKeyBuilder* b) const = 0;
 
     /**
@@ skipping 37 matching lines @@
     int                                          fNumTransformsExclChildren;
 
     // TODO: These must convert their processors to pending-execution refs when the parent is
     // converted (do this automatically in GrProgramElement?).
     SkTArray<const GrFragmentProcessor*, true>   fChildProcessors;
 
     typedef GrProcessor INHERITED;
 };
 
 #endif