Simplify benchmark internal API.

bench/MemsetBench.cpp

Index: bench/MemsetBench.cpp
diff --git a/bench/MemsetBench.cpp b/bench/MemsetBench.cpp
index 17adf0402aca64654fda400b989dee140484eeeb..bfdff5cbcc4b8ff11ce41f9515cbfaa2b96a6e92 100644
--- a/bench/MemsetBench.cpp
+++ b/bench/MemsetBench.cpp
@@ -47,8 +47,8 @@ protected:
         return fName.c_str();
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
-        for (int i = 0; i < this->getLoops(); ++i) {
+    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
+        for (int i = 0; i < loops; ++i) {
             this->performTest();
         }
     }