Cleanup GrDrawTarget now that all paths lead to GrBatch

src/gpu/GrBufferedDrawTarget.h

-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrBufferedDrawTarget_DEFINED
-#define GrBufferedDrawTarget_DEFINED
-
-#include "GrDrawTarget.h"
-#include "GrCommandBuilder.h"
-#include "SkChunkAlloc.h"
-
-/**
- * GrBufferedDrawTarget is an implementation of GrDrawTarget that queues up draws for eventual
- * playback into a GrGpu. In theory one draw buffer could playback into another. Similarly, it is
- * the caller's responsibility to ensure that all referenced textures, buffers, and render-targets
- * are associated in the GrGpu object that the buffer is played back into.
- */
-class GrBufferedDrawTarget : public GrClipTarget {
-public:
-    /**
-     * Creates a GrBufferedDrawTarget
-     *
-     * @param context    the context object that owns this draw buffer.
-     */
-    GrBufferedDrawTarget(GrContext* context);
-
-    ~GrBufferedDrawTarget() override;
-
-protected:
-    void onDrawBatch(GrBatch*) override;
-
-private:
-    void onReset() override;
-    void onFlush() override;
-
-    SkAutoTDelete<GrCommandBuilder>     fCommands;
-    uint32_t                            fDrawID;
-
-    typedef GrClipTarget INHERITED;
-};
-
-#endif