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/FSRectBench.cpp b/bench/FSRectBench.cpp
index 5ae4c2f..0083dd4 100644
--- a/bench/FSRectBench.cpp
+++ b/bench/FSRectBench.cpp
@@ -44,9 +44,9 @@
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkPaint paint;
-        for (int i = 0; i < N; ++i) {
-            paint.setColor(fColors[i]);
-            canvas->drawRect(fRects[i], paint);
+        for (int i = 0; i < this->getLoops(); ++i) {
+            paint.setColor(fColors[i % N]);
+            canvas->drawRect(fRects[i % N], paint);
         }
     }
 
@@ -54,7 +54,7 @@
     enum {
         W = 640,
         H = 480,
-        N = SkBENCHLOOP(300)
+        N = 300,
     };
     SkRect  fRects[N];
     SkColor fColors[N];