Add Batch logging

src/gpu/GrBatch.cpp

Index: src/gpu/GrBatch.cpp
diff --git a/src/gpu/GrBatch.cpp b/src/gpu/GrBatch.cpp
index e69819e2d3911c562f7d0e3589d497ddf2445213..7fee5f25c3d6646b6c505a0a2e6e507afe22d2b5 100644
--- a/src/gpu/GrBatch.cpp
+++ b/src/gpu/GrBatch.cpp
@@ -36,7 +36,9 @@ public:
 };
 }
 
-int32_t GrBatch::gCurrBatchClassID = GrBatch::kIllegalBatchClassID;
+int32_t GrBatch::gCurrBatchClassID = GrBatch::kIllegalBatchID;
+
+GrBATCH_SPEW(int32_t GrBatch::gCurrBatchUniqueID = GrBatch::kIllegalBatchID;)
 
 void* GrBatch::operator new(size_t size) {
     return MemoryPoolAccessor().pool()->allocate(size);