Start using GrGpuCommandBuffer in GrDrawTarget.

src/gpu/batches/GrVertexBatch.cpp

Index: src/gpu/batches/GrVertexBatch.cpp
diff --git a/src/gpu/batches/GrVertexBatch.cpp b/src/gpu/batches/GrVertexBatch.cpp
index 8a5dd6289bb30ad7427ea4b8ff5671ed3cfbb981..3ec62a43e14e244b85a16eb45bab1315ea3c1cd2 100644
--- a/src/gpu/batches/GrVertexBatch.cpp
+++ b/src/gpu/batches/GrVertexBatch.cpp
@@ -62,7 +62,7 @@ void* GrVertexBatch::QuadHelper::init(Target* target, size_t vertexStride,
                                  quadIndexBuffer, kVerticesPerQuad, kIndicesPerQuad, quadsToDraw);
 }
 
-void GrVertexBatch::onDraw(GrBatchFlushState* state) {
+void GrVertexBatch::onDraw(GrBatchFlushState* state, GrGpuCommandBuffer* buffer) {
     int currUploadIdx = 0;
     int currMeshIdx = 0;
 
@@ -75,8 +75,8 @@ void GrVertexBatch::onDraw(GrBatchFlushState* state) {
             state->doUpload(fInlineUploads[currUploadIdx++].fUpload);
         }
         const QueuedDraw &draw = fQueuedDraws[currDrawIdx];
-        state->gpu()->draw(*this->pipeline(), *draw.fGeometryProcessor.get(),
-                           fMeshes.begin() + currMeshIdx, draw.fMeshCnt);
+        buffer->draw(*this->pipeline(), *draw.fGeometryProcessor.get(),
+                     fMeshes.begin() + currMeshIdx, draw.fMeshCnt);
         currMeshIdx += draw.fMeshCnt;
         state->flushToken();
     }