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/GameBench.cpp b/bench/GameBench.cpp
index 3d371be..839440b 100644
--- a/bench/GameBench.cpp
+++ b/bench/GameBench.cpp
@@ -86,7 +86,7 @@
         }
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         SkRandom scaleRand;
         SkRandom transRand;
         SkRandom rotRand;
@@ -143,7 +143,7 @@
                                                   SkShader::kClamp_TileMode,
                                                   SkShader::kClamp_TileMode))->unref();
 
-        for (int i = 0; i < this->getLoops(); ++i, ++fNumSaved) {
+        for (int i = 0; i < loops; ++i, ++fNumSaved) {
             if (0 == i % kNumBeforeClear) {
                 if (kPartial_Clear == fClear) {
                     for (int j = 0; j < fNumSaved; ++j) {