Split GrDrawBatch and GrVertexBatch into their own files

src/gpu/GrImmediateDrawTarget.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrImmediateDrawTarget.h"
 
 #include "GrGpu.h"
 #include "GrPipeline.h"
 #include "GrRenderTarget.h"
 #include "SkRect.h"
 #include "SkTypes.h"
 
-#include "batches/GrBatch.h"
+#include "batches/GrDrawBatch.h"
+#include "batches/GrVertexBatch.h"
 
 GrImmediateDrawTarget::GrImmediateDrawTarget(GrContext* context)
     : INHERITED(context)
     , fBatchTarget(this->getGpu())
     , fDrawID(0) {
 }
 
 GrImmediateDrawTarget::~GrImmediateDrawTarget() {
     this->reset();
 }
@@ skipping 38 matching lines @@
     this->getGpu()->discard(renderTarget);
 }
 
 void GrImmediateDrawTarget::onReset() {
     fBatchTarget.reset();
 }
 
 void GrImmediateDrawTarget::onFlush() {
     ++fDrawID;
 }