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/ChromeBench.cpp b/bench/ChromeBench.cpp
index 9392065..b2fc185 100644
--- a/bench/ChromeBench.cpp
+++ b/bench/ChromeBench.cpp
@@ -461,14 +461,14 @@
 protected:
 
     virtual const char* onGetName() { return "chrome_scrollGmail"; }
-    virtual void onDraw(SkCanvas* canvas) {
+    virtual void onDraw(const int loops, SkCanvas* canvas) {
         SkDEBUGCODE(this->validateBounds(canvas));
         SkPaint paint;
         this->setupPaint(&paint);
         for (int i = 0; i < N; i++) {
             SkRect current;
             setRectangle(current, i);
-            for (int j = 0; j < this->getLoops() * gmailScrollingRectSpec[i*3]; j++) {
+            for (int j = 0; j < loops * gmailScrollingRectSpec[i*3]; j++) {
                 canvas->drawRect(current, paint);
             }
         }