Fix for nexus 5 crashing in GL benches

bench/nanobench.cpp

Index: bench/nanobench.cpp
diff --git a/bench/nanobench.cpp b/bench/nanobench.cpp
index a1db0acd80b4e6616b87ae8261cb51a570618e0e..99be03042e91b9ccab16b80548176d38d3936727 100644
--- a/bench/nanobench.cpp
+++ b/bench/nanobench.cpp
@@ -208,6 +208,7 @@ static double time(int loops, Benchmark* bench, Target* target) {
     if (canvas) {
         canvas->clear(SK_ColorWHITE);
     }
+    bench->perCanvasLastCallBeforeDraw(canvas);
     WallTimer timer;
     timer.start();
     canvas = target->beginTiming(canvas);
@@ -217,6 +218,7 @@ static double time(int loops, Benchmark* bench, Target* target) {
     }
     target->endTiming();
     timer.end();
+    bench->perCanvasFirstCallAfterDraw(canvas);
     return timer.fWall;
 }