Rename GrMesh to GrSimpleMesh

Change-Id: Ib164ff3ec41cb798385f2feea8ad09c037dbc30d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/276837
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
diff --git a/src/gpu/ops/GrFillRectOp.cpp b/src/gpu/ops/GrFillRectOp.cpp
index e1b5fba..255bd0d 100644
--- a/src/gpu/ops/GrFillRectOp.cpp
+++ b/src/gpu/ops/GrFillRectOp.cpp
@@ -450,7 +450,7 @@
     GrQuadBuffer<ColorAndAA> fQuads;
     char* fPrePreparedVertices = nullptr;
 
-    GrMesh*        fMesh = nullptr;
+    GrSimpleMesh*  fMesh = nullptr;
     GrProgramInfo* fProgramInfo = nullptr;
     ColorType      fColorType;