Introduce GrBatch subclasses GrDrawBatch and GrVertexBatch to prepare for non-drawing batches

src/gpu/GrProcOptInfo.h

Index: src/gpu/GrProcOptInfo.h
diff --git a/src/gpu/GrProcOptInfo.h b/src/gpu/GrProcOptInfo.h
index 0430916405414433bc0d0cd357cab7faf05dc97f..cf7e3503b96bd8f96438dc0288acc66bcb7518c8 100644
--- a/src/gpu/GrProcOptInfo.h
+++ b/src/gpu/GrProcOptInfo.h
@@ -12,7 +12,7 @@
 #include "GrInvariantOutput.h"
 #include "GrStagedProcessor.h"
 
-class GrBatch;
+class GrDrawBatch;
 class GrFragmentProcessor;
 class GrPrimitiveProcessor;
 class GrProcessor;
@@ -34,8 +34,8 @@ public:
     void calcWithInitialValues(const GrFragmentStage*, int stageCount, GrColor startColor,
                                GrColorComponentFlags flags, bool areCoverageStages);
 
-    void calcColorWithBatch(const GrBatch*, const GrFragmentStage*, int stagecount);
-    void calcCoverageWithBatch(const GrBatch*, const GrFragmentStage*, int stagecount);
+    void calcColorWithBatch(const GrDrawBatch*, const GrFragmentStage*, int stagecount);
+    void calcCoverageWithBatch(const GrDrawBatch*, const GrFragmentStage*, int stagecount);
 
     // TODO delete these when batch is everywhere
     void calcColorWithPrimProc(const GrPrimitiveProcessor*, const GrFragmentStage*, int stagecount);