Start using GrGpuCommandBuffer in GrDrawTarget.

src/gpu/batches/GrClearBatch.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 GrClearBatch_DEFINED
 #define GrClearBatch_DEFINED
 
 #include "GrBatch.h"
 #include "GrBatchFlushState.h"
 #include "GrGpu.h"
+#include "GrGpuCommandBuffer.h"
 #include "GrRenderTarget.h"
 
 class GrClearBatch final : public GrBatch {
 public:
     DEFINE_BATCH_CLASS_ID
 
     GrClearBatch(const SkIRect& rect,  GrColor color, GrRenderTarget* rt)
         : INHERITED(ClassID())
         , fRect(rect)
         , fColor(color)
@@ skipping 28 matching lines @@
             return true;
         } else if (cb->fColor == fColor && fRect.contains(cb->fRect)) {
             return true;
         }
         return false;
     }
 
     void onPrepare(GrBatchFlushState*) override {}
 
     void onDraw(GrBatchFlushState* state) override {
-        state->gpu()->clear(fRect, fColor, fRenderTarget.get());
+        state->commandBuffer()->clear(fRect, fColor, fRenderTarget.get());
     }
 
     SkIRect                                                 fRect;
     GrColor                                                 fColor;
     GrPendingIOResource<GrRenderTarget, kWrite_GrIOType>    fRenderTarget;
 
     typedef GrBatch INHERITED;
 };
 
 class GrClearStencilClipBatch final : public GrBatch {
@@ skipping 20 matching lines @@
                       fRenderTarget.get());
         return string;
     }
 
 private:
     bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { return false; }
 
     void onPrepare(GrBatchFlushState*) override {}
 
     void onDraw(GrBatchFlushState* state) override {
-        state->gpu()->clearStencilClip(fRect, fInsideClip, fRenderTarget.get());
+        state->commandBuffer()->clearStencilClip(fRect, fInsideClip, fRenderTarget.get());
     }
 
     SkIRect                                                 fRect;
     bool                                                    fInsideClip;
     GrPendingIOResource<GrRenderTarget, kWrite_GrIOType>    fRenderTarget;
 
     typedef GrBatch INHERITED;
 };
 
 #endif