trivial CL to add drawBatch to GrDrawContext

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 241 matching lines @@
      *                      the dash information (intervals, count, phase).
      */
     void drawOval(GrRenderTarget*,
                   const GrClip&,
                   const GrPaint& paint,
                   const SkMatrix& viewMatrix,
                   const SkRect& oval,
                   const GrStrokeInfo& strokeInfo);
 
 
+    /**
+     * Draws a batch
+     *
+     * @param paint    describes how to color pixels.
+     * @param batch    the batch to draw
+     */
+    void drawBatch(GrRenderTarget*, const GrClip&, const GrPaint&, GrBatch*);
+
 private:
     friend class GrAtlasTextContext; // for access to drawBatch
     friend class GrContext; // for ctor
 
     GrDrawContext(GrContext*, GrDrawTarget*, const SkSurfaceProps&);
 
     GrTextContext* createTextContext(GrRenderTarget*, const SkSurfaceProps&);
 
     // Checks if the context has been abandoned and if the rendertarget is owned by this context
     bool prepareToDraw(GrRenderTarget* rt);
@@ skipping 11 matching lines @@
     void drawBatch(GrPipelineBuilder* pipelineBuilder, GrBatch* batch);
 
     GrContext*          fContext;     // owning context -> no ref
     GrDrawTarget*       fDrawTarget;
     GrTextContext*      fTextContext; // lazily created
 
     SkSurfaceProps      fSurfaceProps;
 };
 
 #endif