Fix for nexus 5 crashing in GL benches

bench/GLBench.h

Index: bench/GLBench.h
diff --git a/bench/GLBench.h b/bench/GLBench.h
index 0755c4f1a893410f0ff600c32389616704b54dc0..dde0358abc6d104051bdf43ea96f762963f92b5d 100644
--- a/bench/GLBench.h
+++ b/bench/GLBench.h
@@ -29,9 +29,9 @@ public:
 protected:
     const GrGLContext* getGLContext(SkCanvas*);
     virtual const GrGLContext* onGetGLContext(const GrGLContext* ctx) { return ctx; }
-    void onPerCanvasPreDraw(SkCanvas* canvas) override;
+    void onPreDraw(SkCanvas*) override;
     virtual void setup(const GrGLContext*)=0;
-    void onPerCanvasPostDraw(SkCanvas* canvas) override;
+    void onPostDraw(SkCanvas* canvas) override;
     virtual void teardown(const GrGLInterface*)=0;
     void onDraw(const int loops, SkCanvas*) override;
     virtual void glDraw(const int loops, const GrGLContext*)=0;