Move GrDrawTarget::clear logic into GrDrawContext

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 88 matching lines @@
     void prepareBatches(GrBatchFlushState* flushState);
     void drawBatches(GrBatchFlushState* flushState);
 
     /**
      * Gets the capabilities of the draw target.
      */
     const GrCaps* caps() const { return fGpu->caps(); }
 
     void drawBatch(const GrPipelineBuilder&, GrDrawContext*, const GrClip&, GrDrawBatch*);
 
+    void addBatch(sk_sp<GrBatch>);
+
     /**
      * Draws path into the stencil buffer. The fill must be either even/odd or
      * winding (not inverse or hairline). It will respect the HW antialias flag
      * on the GrPipelineBuilder (if possible in the 3D API).  Note, we will never have an inverse
      * fill with stencil path
      */
     void stencilPath(const GrPipelineBuilder&, GrDrawContext*,
                      const GrClip&, const SkMatrix& viewMatrix,
                      const GrPath*, GrPathRendering::FillType);
 
-    /**
-     * Clear the passed in drawContext. Ignores the GrPipelineBuilder and clip. Clears the whole
-     * thing if rect is nullptr, otherwise just the rect. If canIgnoreRect is set then the entire
-     * drawContext can be optionally cleared.
-     */
-    void clear(const SkIRect* rect,
-               GrColor color,
-               bool canIgnoreRect,
-               GrDrawContext*);
-
     /** Discards the contents render target. */
     void discard(GrRenderTarget*);
 
     /**
      * Copies a pixel rectangle from one surface to another. This call may finalize
      * reserved vertex/index data (as though a draw call was made). The src pixels
      * copied are specified by srcRect. They are copied to a rect of the same
      * size in dst with top left at dstPoint. If the src rect is clipped by the
      * src bounds then  pixel values in the dst rect corresponding to area clipped
      * by the src rect are not overwritten. This method is not guaranteed to succeed
@@ skipping 97 matching lines @@
     bool                                            fDrawBatchBounds;
     int                                             fMaxBatchLookback;
     int                                             fMaxBatchLookahead;
 
     SkAutoTDelete<gr_instanced::InstancedRendering> fInstancedRendering;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif