Simplify benchmark internal API.

bench/BitmapScaleBench.cpp

Index: bench/BitmapScaleBench.cpp
diff --git a/bench/BitmapScaleBench.cpp b/bench/BitmapScaleBench.cpp
index ae3df71c22da5c4648415e4b3b8d3bcf146374a3..926111d12db5936621372be0d62675edba5fd1ea 100644
--- a/bench/BitmapScaleBench.cpp
+++ b/bench/BitmapScaleBench.cpp
@@ -69,13 +69,13 @@ protected:
         fMatrix.setScale( scale(), scale() );
     }
 
-    virtual void onDraw(SkCanvas*) {
+    virtual void onDraw(const int loops, SkCanvas*) {
         SkPaint paint;
         this->setupPaint(&paint);
 
         preBenchSetup();
 
-        for (int i = 0; i < this->getLoops(); i++) {
+        for (int i = 0; i < loops; i++) {
             doScaleImage();
         }
     }