Simplify benchmark internal API.

I'm not quite sure why I wrote such a convoluted API with setLoops()/getLoops().
This replaces it with a loops argument passed to onDraw().

This CL is largely mechanical translation from the old API to the new one.
MathBench used this->getLoops() outside onDraw(), which seems incorrect.  I
fixed it.

BUG=
R=djsollen@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/99893003

git-svn-id: http://skia.googlecode.com/svn/trunk@12466 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/PathIterBench.cpp b/bench/PathIterBench.cpp
index aa2042c..4e956ce 100644
--- a/bench/PathIterBench.cpp
+++ b/bench/PathIterBench.cpp
@@ -65,9 +65,9 @@
         return fName.c_str();
     }
 
-    virtual void onDraw(SkCanvas*) SK_OVERRIDE {
+    virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
         if (fRaw) {
-            for (int i = 0; i < this->getLoops(); ++i) {
+            for (int i = 0; i < loops; ++i) {
                 SkPath::RawIter iter(fPath);
                 SkPath::Verb verb;
                 SkPoint      pts[4];
@@ -75,7 +75,7 @@
                 while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { }
             }
         } else {
-            for (int i = 0; i < this->getLoops(); ++i) {
+            for (int i = 0; i < loops; ++i) {
                 SkPath::Iter iter(fPath, false);
                 SkPath::Verb verb;
                 SkPoint      pts[4];