Initial CL to create Reorder command builder behind a flag

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 206 matching lines @@
                                   // so that should be okay
     };
 
     virtual DrawToken getCurrentDrawToken() { return DrawToken(this, 0); }
 
     bool programUnitTest(int maxStages);
 
 protected:
     friend class GrCommandBuilder; // for PipelineInfo
     friend class GrInOrderCommandBuilder; // for PipelineInfo
+    friend class GrReorderCommandBuilder; // for PipelineInfo
     friend class GrTargetCommands; // for PipelineInfo
 
     GrContext* getContext() { return fContext; }
     const GrContext* getContext() const { return fContext; }
 
     GrGpu* getGpu() {
         SkASSERT(fContext && fContext->getGpu());
         return fContext->getGpu();
     }
     const GrGpu* getGpu() const {
@@ skipping 140 matching lines @@
     virtual bool setupClip(GrPipelineBuilder*,
                            GrPipelineBuilder::AutoRestoreFragmentProcessors*,
                            GrPipelineBuilder::AutoRestoreStencil*,
                            GrScissorState* scissorState,
                            const SkRect* devBounds) override;
 
     typedef GrDrawTarget INHERITED;
 };
 
 #endif