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/TileBench.cpp b/bench/TileBench.cpp
index 7f2e7a8..44235eb 100644
--- a/bench/TileBench.cpp
+++ b/bench/TileBench.cpp
@@ -34,7 +34,6 @@
     bool                fDoFilter;
     bool                fDoTrans;
     bool                fDoScale;
-    enum { N = SkBENCHLOOP(20) };
     static const int kWidth = 1;
     static const int kHeight = 300;
 
@@ -106,7 +105,7 @@
         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);
             }