All batches do their own pipeline compare

src/gpu/GrRectBatch.cpp

Index: src/gpu/GrRectBatch.cpp
diff --git a/src/gpu/GrRectBatch.cpp b/src/gpu/GrRectBatch.cpp
index 222aaef8a90e78780f19813d511e48cc57d37ae8..6933dc1c57787f5520740449d826a0741e54dc18 100644
--- a/src/gpu/GrRectBatch.cpp
+++ b/src/gpu/GrRectBatch.cpp
@@ -173,6 +173,10 @@ private:
     bool coverageIgnored() const { return fBatch.fCoverageIgnored; }
 
     bool onCombineIfPossible(GrBatch* t) override {
+        if (!this->pipeline()->isEqual(*t->pipeline())) {
+            return false;
+        }
+
         RectBatch* that = t->cast<RectBatch>();
 
         if (this->hasLocalRect() != that->hasLocalRect()) {