Draft change to start pulling uniform color into GP

src/gpu/GrInOrderDrawBuffer.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 GrInOrderDrawBuffer_DEFINED
 #define GrInOrderDrawBuffer_DEFINED
 
@@ skipping 242 matching lines @@
     virtual bool isIssued(uint32_t drawID) SK_OVERRIDE { return drawID != fDrawID; }
 
     // TODO: Use a single allocator for commands and records
     enum {
         kCmdBufferInitialSizeInBytes = 8 * 1024,
         kPathIdxBufferMinReserve     = 2 * 64,  // 64 uint16_t's
         kPathXformBufferMinReserve   = 2 * 64,  // 64 two-float transforms
     };
 
     CmdBuffer                           fCmdBuffer;
-    const GrOptDrawState*               fPrevState;
+    GrOptDrawState*                     fPrevState;
     SkTArray<GrTraceMarkerSet, false>   fGpuCmdMarkers;
     SkTDArray<char>                     fPathIndexBuffer;
     SkTDArray<float>                    fPathTransformBuffer;
     uint32_t                            fDrawID;
 
     typedef GrFlushToGpuDrawTarget INHERITED;
 };
 
 #endif