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/PathIterBench.cpp b/bench/PathIterBench.cpp
index 987a752..c5ac7e4 100644
--- a/bench/PathIterBench.cpp
+++ b/bench/PathIterBench.cpp
@@ -30,8 +30,6 @@
     SkPath      fPath;
     bool        fRaw;
 
-    enum { N = SkBENCHLOOP(500) };
-
 public:
     PathIterBench(void* param, bool raw) : INHERITED(param) {
         fName.printf("pathiter_%s", raw ? "raw" : "consume");
@@ -67,7 +65,7 @@
 
     virtual void onDraw(SkCanvas*) SK_OVERRIDE {
         if (fRaw) {
-            for (int i = 0; i < N; ++i) {
+            for (int i = 0; i < this->getLoops(); ++i) {
                 SkPath::RawIter iter(fPath);
                 SkPath::Verb verb;
                 SkPoint      pts[4];
@@ -75,7 +73,7 @@
                 while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { }
             }
         } else {
-            for (int i = 0; i < N; ++i) {
+            for (int i = 0; i < this->getLoops(); ++i) {
                 SkPath::Iter iter(fPath, false);
                 SkPath::Verb verb;
                 SkPoint      pts[4];