Simplify benchmark internal API.

bench/BlurRectBench.cpp

Index: bench/BlurRectBench.cpp
diff --git a/bench/BlurRectBench.cpp b/bench/BlurRectBench.cpp
index e2528afc7f748e37e3bf8216ce5ed262f8697897..d4876ce8a8e26274c76fc75c5561c3da83c36e9b 100644
--- a/bench/BlurRectBench.cpp
+++ b/bench/BlurRectBench.cpp
@@ -51,7 +51,7 @@ protected:
         fName = name;
     }
 
-    virtual void onDraw(SkCanvas*) {
+    virtual void onDraw(const int loops, SkCanvas*) {
         SkPaint paint;
         this->setupPaint(&paint);
 
@@ -62,7 +62,7 @@ protected:
 
         preBenchSetup(r);
 
-        for (int i = 0; i < this->getLoops(); i++) {
+        for (int i = 0; i < loops; i++) {
             makeBlurryRect(r);
         }
     }