Rename GrBatch to GrOp

Change-Id: I27b6324f8040899fafeda23ca524bc54a4dbf090
Reviewed-on: https://skia-review.googlesource.com/5392
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/src/gpu/instanced/InstancedRendering.cpp b/src/gpu/instanced/InstancedRendering.cpp
index 99a749a..a46f24b 100644
--- a/src/gpu/instanced/InstancedRendering.cpp
+++ b/src/gpu/instanced/InstancedRendering.cpp
@@ -382,7 +382,7 @@
     fIsTracked = true;
 }
 
-bool InstancedRendering::Batch::onCombineIfPossible(GrBatch* other, const GrCaps& caps) {
+bool InstancedRendering::Batch::onCombineIfPossible(GrOp* other, const GrCaps& caps) {
     Batch* that = static_cast<Batch*>(other);
     SkASSERT(fInstancedRendering == that->fInstancedRendering);
     SkASSERT(fTailDraw);