use table of procs (and unrolling) to speed up mapPts

bench/MatrixBench.cpp

Index: bench/MatrixBench.cpp
diff --git a/bench/MatrixBench.cpp b/bench/MatrixBench.cpp
index 6bd1e2a8a6c901703c64fb9e067130734caacb48..68195e70e4d95ab0eb665ef82128b8f12aa2b812 100644
--- a/bench/MatrixBench.cpp
+++ b/bench/MatrixBench.cpp
@@ -267,8 +267,7 @@ DEF_BENCH( return new InvertMapRectMatrixBench(
 
 ///////////////////////////////////////////////////////////////////////////////
 
-static SkMatrix make_ident() { SkMatrix m; m.reset(); return m; }
-static SkMatrix make_trans() { SkMatrix m; m.setTranslate(2, 3); return m; }
+static SkMatrix make_trans() { return SkMatrix::MakeTrans(2, 3); }
 static SkMatrix make_scale() { SkMatrix m(make_trans()); m.postScale(1.5f, 0.5f); return m; }
 static SkMatrix make_afine() { SkMatrix m(make_trans()); m.postRotate(15); return m; }
 
@@ -302,8 +301,6 @@ public:
         }
     }
 };
-DEF_BENCH( return new MapPointsMatrixBench("mappts_ident0", make_ident(), false); )
-DEF_BENCH( return new MapPointsMatrixBench("mappts_ident1", make_ident(), true); )
 DEF_BENCH( return new MapPointsMatrixBench("mappts_trans0", make_trans(), false); )
 DEF_BENCH( return new MapPointsMatrixBench("mappts_trans1", make_trans(), true); )
 DEF_BENCH( return new MapPointsMatrixBench("mappts_scale0", make_scale(), false); )