Reduce calls sites where both the GrDrawContext & GrRenderTarget are both passed

include/gpu/GrDrawContext.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 GrDrawContext_DEFINED
 #define GrDrawContext_DEFINED
 
@@ skipping 260 matching lines @@
      *
      * @param paint    describes how to color pixels.
      * @param batch    the batch to draw
      */
     void drawBatch(const GrClip&, const GrPaint&, GrDrawBatch*);
 
     int width() const { return fRenderTarget->width(); }
     int height() const { return fRenderTarget->height(); }
     int numColorSamples() const { return fRenderTarget->numColorSamples(); }
 
+    GrRenderTarget* accessRenderTarget() { return fRenderTarget; }
+
 private:
     friend class GrAtlasTextContext; // for access to drawBatch
     friend class GrDrawingManager; // for ctor
 
     SkDEBUGCODE(void validate() const;)
 
     GrDrawContext(GrDrawingManager*, GrRenderTarget*, const SkSurfaceProps* surfaceProps);
 
     void internalDrawPath(GrPipelineBuilder*,
                           const SkMatrix& viewMatrix,
@@ skipping 13 matching lines @@
 
     // In MDB-mode the drawTarget can be closed by some other drawContext that has picked
     // it up. For this reason, the drawTarget should only ever be accessed via 'getDrawTarget'.
     GrDrawTarget*     fDrawTarget;
     GrTextContext*    fTextContext; // lazily gotten from GrContext::DrawingManager
 
     SkSurfaceProps    fSurfaceProps;
 };
 
 #endif