Major bench refactoring.
   - Use FLAGS_.
   - Remove outer repeat loop.
   - Tune inner loop automatically.

BUG=skia:1590
R=epoger@google.com, scroggo@google.com

Review URL: https://codereview.chromium.org/23478013

git-svn-id: http://skia.googlecode.com/svn/trunk@11187 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/ChartBench.cpp b/bench/ChartBench.cpp
index 1ecf30a..6990049 100644
--- a/bench/ChartBench.cpp
+++ b/bench/ChartBench.cpp
@@ -127,7 +127,7 @@
             }
         }
 
-        for (int frame = 0; frame < kFramesPerRun; ++frame) {
+        for (int frame = 0; frame < this->getLoops(); ++frame) {
 
             canvas->clear(0xFFE0F0E0);
 
@@ -183,8 +183,6 @@
         kNumGraphs = 5,
         kPixelsPerTick = 3,
         kShiftPerFrame = 1,
-
-        kFramesPerRun = SkBENCHLOOP(5),
     };
     int                 fShift;
     SkISize             fSize;