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/PathUtilsBench.cpp b/bench/PathUtilsBench.cpp
index 613d49a..c3640f7 100644
--- a/bench/PathUtilsBench.cpp
+++ b/bench/PathUtilsBench.cpp
@@ -41,8 +41,6 @@
     SkString fName;
     char* bits[H * STRIDE];
 
-    enum { N = SkBENCHLOOP(20) };
-
 public:
     PathUtilsBench(void* param, Proc proc, const char name[]) : INHERITED(param) {
         fProc = proc;
@@ -56,7 +54,7 @@
 
     virtual void onDraw(SkCanvas* canvas) {
 
-        for (int i = 0; i < N; ++i){
+        for (int i = 0; i < this->getLoops(); ++i){
             //create a random 16x16 bitmap
             fillRandomBits(H * STRIDE, (char*) &bits);