Dependencies are now added between the drawTargets in GrPipeline

src/gpu/GrPipeline.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrPipeline_DEFINED
 #define GrPipeline_DEFINED
 
@@ skipping 66 matching lines @@
                    bBounds.fBottom <= aBounds.fTop;
         }
         return true;
     }
 
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name GrFragmentProcessors
 
+    // Make the renderTarget's drawTarget (if it exists) be dependent on any
+    // drawTargets in this pipeline
+    void addDependenciesTo(GrRenderTarget* rt) const;
 
     int numColorFragmentProcessors() const { return fNumColorProcessors; }
     int numCoverageFragmentProcessors() const {
         return fFragmentProcessors.count() - fNumColorProcessors;
     }
     int numFragmentProcessors() const { return fFragmentProcessors.count(); }
 
     const GrXferProcessor* getXferProcessor() const { return fXferProcessor.get(); }
 
     const GrFragmentProcessor& getColorFragmentProcessor(int idx) const {
@@ skipping 81 matching lines @@
     FragmentProcessorArray              fFragmentProcessors;
     bool                                fReadsFragPosition;
 
     // This value is also the index in fFragmentProcessors where coverage processors begin.
     int                                 fNumColorProcessors;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif