Major bench refactoring.

bench/TileBench.cpp

Index: bench/TileBench.cpp
diff --git a/bench/TileBench.cpp b/bench/TileBench.cpp
index 7f2e7a8e95ae3e7164fe613921f8622f95955edc..44235eb40929fa7a9c8a8ce44bb7e44bf6f7156b 100644
--- a/bench/TileBench.cpp
+++ b/bench/TileBench.cpp
@@ -34,7 +34,6 @@ class ConstXTileBench : public SkBenchmark {
     bool                fDoFilter;
     bool                fDoTrans;
     bool                fDoScale;
-    enum { N = SkBENCHLOOP(20) };
     static const int kWidth = 1;
     static const int kHeight = 300;
 
@@ -106,7 +105,7 @@ protected:
         SkPaint bgPaint;
         bgPaint.setColor(SK_ColorWHITE);
 
-        for (int i = 0; i < N; i++) {
+        for (int i = 0; i < this->getLoops(); i++) {
             if (fDoTrans) {
                 canvas->drawRect(r, bgPaint);
             }