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/SortBench.cpp b/bench/SortBench.cpp
index 161e979..1f888f2 100644
--- a/bench/SortBench.cpp
+++ b/bench/SortBench.cpp
@@ -122,9 +122,9 @@
         gRec[fType].fProc(fUnsorted.get());
     }
 
-    virtual void onDraw(SkCanvas*) SK_OVERRIDE {
+    virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
         SkAutoTMalloc<int> sorted(N);
-        for (int i = 0; i < this->getLoops(); i++) {
+        for (int i = 0; i < loops; i++) {
             memcpy(sorted.get(), fUnsorted.get(), N*sizeof(int));
             fSortProc(sorted.get());
 #ifdef SK_DEBUG