Move clip off of draw target

src/gpu/GrSWMaskHelper.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrSWMaskHelper_DEFINED
 #define GrSWMaskHelper_DEFINED
 
 #include "GrColor.h"
 #include "GrPipelineBuilder.h"
 #include "SkBitmap.h"
 #include "SkDraw.h"
 #include "SkMatrix.h"
 #include "SkRasterClip.h"
 #include "SkRegion.h"
 #include "SkTextureCompressor.h"
 #include "SkTypes.h"
 
+class GrClip;
 class GrContext;
 class GrTexture;
 class SkPath;
 class SkStrokeRec;
 class GrDrawTarget;
 
 /**
  * The GrSWMaskHelper helps generate clip masks using the software rendering
  * path. It is intended to be used as:
  *
@@ skipping 101 matching lines @@
                          const void *data, size_t rowbytes);
 
     // Compresses the bitmap stored in fBM and sends the compressed data
     // to the GPU to be stored in 'texture' using sendTextureData.
     void compressTextureData(GrTexture *texture, const GrSurfaceDesc& desc);
 
     typedef SkNoncopyable INHERITED;
 };
 
 #endif // GrSWMaskHelper_DEFINED