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/TextBench.cpp b/bench/TextBench.cpp
index 9334c33..7aac2c0 100644
--- a/bench/TextBench.cpp
+++ b/bench/TextBench.cpp
@@ -45,7 +45,6 @@
     FontQuality fFQ;
     bool        fDoPos;
     SkPoint*    fPos;
-    enum { N = SkBENCHLOOP(800) };
 public:
     TextBench(void* param, const char text[], int ps,
               SkColor color, FontQuality fq, bool doPos = false) : INHERITED(param) {
@@ -112,7 +111,7 @@
             canvas->translate(SK_Scalar1, SK_Scalar1);
         }
 
-        for (int i = 0; i < N; i++) {
+        for (int i = 0; i < this->getLoops(); i++) {
             if (fDoPos) {
                 canvas->drawPosText(fText.c_str(), fText.size(), fPos, paint);
             } else {