Major bench refactoring.

bench/ChartBench.cpp

Index: bench/ChartBench.cpp
diff --git a/bench/ChartBench.cpp b/bench/ChartBench.cpp
index 1ecf30ab842f623b672d1cd484d0d52301e7679b..699004906520f9e2d6415e072b6b0feddf970c6b 100644
--- a/bench/ChartBench.cpp
+++ b/bench/ChartBench.cpp
@@ -127,7 +127,7 @@ protected:
             }
         }
 
-        for (int frame = 0; frame < kFramesPerRun; ++frame) {
+        for (int frame = 0; frame < this->getLoops(); ++frame) {
 
             canvas->clear(0xFFE0F0E0);
 
@@ -183,8 +183,6 @@ private:
         kNumGraphs = 5,
         kPixelsPerTick = 3,
         kShiftPerFrame = 1,
-
-        kFramesPerRun = SkBENCHLOOP(5),
     };
     int                 fShift;
     SkISize             fSize;