Start using GrGpuCommandBuffer in GrDrawTarget.

src/gpu/batches/GrDrawPathBatch.h

Index: src/gpu/batches/GrDrawPathBatch.h
diff --git a/src/gpu/batches/GrDrawPathBatch.h b/src/gpu/batches/GrDrawPathBatch.h
index 7e695d83df6c0232202024c39170d9f4e09e20e2..2a85617d4dbc0a40f22cd4e1c4df555c5d516918 100644
--- a/src/gpu/batches/GrDrawPathBatch.h
+++ b/src/gpu/batches/GrDrawPathBatch.h
@@ -84,7 +84,7 @@ private:
 
     bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override { return false; }
 
-    void onDraw(GrBatchFlushState* state) override;
+    void onDraw(GrBatchFlushState* state, GrGpuCommandBuffer* buffer) override;
 
     GrPendingIOResource<const GrPath, kRead_GrIOType> fPath;
 
@@ -177,7 +177,7 @@ private:
 
     bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override;
 
-    void onDraw(GrBatchFlushState* state) override;
+    void onDraw(GrBatchFlushState* state, GrGpuCommandBuffer* buffer) override;
 
     struct Draw {
         void set(const InstanceData* instanceData, SkScalar x, SkScalar y) {