Batched implementation of drawLattice() for GPU

bench/DrawLatticeBench.cpp

Index: bench/DrawLatticeBench.cpp
diff --git a/bench/DrawLatticeBench.cpp b/bench/DrawLatticeBench.cpp
index 4c03ca1dfa020fdf0038800b30c964222b3bf025..baafed6dbb6207c1998d264051d61e8c51e8aa06 100644
--- a/bench/DrawLatticeBench.cpp
+++ b/bench/DrawLatticeBench.cpp
@@ -29,6 +29,10 @@ public:
         return fName.c_str();
     }
 
+    SkIPoint onGetSize() override {
+        return SkIPoint::Make(fDst.width(), fDst.height());
+    }
+
     bool isSuitableFor(Backend backend) override {
         return kRaster_Backend == backend || kGPU_Backend == backend;
     }
@@ -54,6 +58,9 @@ private:
     typedef Benchmark INHERITED;
 };
 
-static int gDivs[2] = { 250, 750, };
-DEF_BENCH(return new DrawLatticeBench(gDivs, 2, gDivs, 2, SkISize::Make(1000, 1000),
-                                      SkRect::MakeWH(4000.0f, 4000.0f), "StandardNine");)
+static int gSmallDivs[2] = { 25, 75, };
+DEF_BENCH(return new DrawLatticeBench(gSmallDivs, 2, gSmallDivs, 2, SkISize::Make(100, 100),
+                                      SkRect::MakeWH(500.0f, 500.0f), "Small");)
+static int gLargeDivs[2] = { 250, 750, };
+DEF_BENCH(return new DrawLatticeBench(gLargeDivs, 2, gLargeDivs, 2, SkISize::Make(1000, 1000),
+                                      SkRect::MakeWH(4000.0f, 4000.0f), "Large");)