Major bench refactoring.

bench/InterpBench.cpp

Index: bench/InterpBench.cpp
diff --git a/bench/InterpBench.cpp b/bench/InterpBench.cpp
index 9b607adf889f20481ac5b09b717fc08255d459bd..513618b8f1d84ab8bfd2c1b0ee65c4a9c09bde9b 100644
--- a/bench/InterpBench.cpp
+++ b/bench/InterpBench.cpp
@@ -33,7 +33,7 @@ protected:
     }
 
     virtual void onDraw(SkCanvas*) {
-        int n = SkBENCHLOOP(kLoop * this->mulLoopCount());
+        int n = this->getLoops() * this->mulLoopCount();
         for (int i = 0; i < n; i++) {
             this->performTest(fDst, fFx, fDx, kBuffer);
         }