Make GrVertexBatch objects hold their own draws during GrDrawTarget flush

src/gpu/GrBatchFlushState.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 "GrBatchFlushState.h"
+
+#include "GrBatchAtlas.h"
+#include "GrPipeline.h"
+
+GrBatchFlushState::GrBatchFlushState(GrGpu* gpu, GrResourceProvider* resourceProvider,
+                                     GrBatchToken lastFlushedToken)
+    : fGpu(gpu)
+    , fUploader(gpu)
+    , fResourceProvider(resourceProvider)
+    , fVertexPool(gpu)
+    , fIndexPool(gpu)
+    , fCurrentToken(lastFlushedToken)
+    , fLastFlushedToken(lastFlushedToken) {}
+
+void* GrBatchFlushState::makeVertexSpace(size_t vertexSize, int vertexCount,
+                                         const GrVertexBuffer** buffer, int* startVertex) {
+    return fVertexPool.makeSpace(vertexSize, vertexCount, buffer, startVertex);
+}
+
+uint16_t* GrBatchFlushState::makeIndexSpace(int indexCount,
+                                            const GrIndexBuffer** buffer, int* startIndex) {
+    return reinterpret_cast<uint16_t*>(fIndexPool.makeSpace(indexCount, buffer, startIndex));
+}