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/GradientBench.cpp b/bench/GradientBench.cpp
index 63fa8ae..9c6c48a 100644
--- a/bench/GradientBench.cpp
+++ b/bench/GradientBench.cpp
@@ -203,14 +203,14 @@
         return fName.c_str();
     }
 
-    virtual void onDraw(SkCanvas* canvas) {
+    virtual void onDraw(const int loops, SkCanvas* canvas) {
         SkPaint paint;
         this->setupPaint(&paint);
 
         paint.setShader(fShader);
 
         SkRect r = { 0, 0, SkIntToScalar(W), SkIntToScalar(H) };
-        for (int i = 0; i < this->getLoops() * kRepeat; i++) {
+        for (int i = 0; i < loops * kRepeat; i++) {
             switch (fGeomType) {
                case kRect_GeomType:
                    canvas->drawRect(r, paint);
@@ -273,7 +273,7 @@
         return fName.c_str();
     }
 
-    virtual void onDraw(SkCanvas* canvas) {
+    virtual void onDraw(const int loops, SkCanvas* canvas) {
         SkPaint paint;
         this->setupPaint(&paint);
 
@@ -283,7 +283,7 @@
             { SkIntToScalar(100), SkIntToScalar(100) },
         };
 
-        for (int i = 0; i < this->getLoops(); i++) {
+        for (int i = 0; i < loops; i++) {
             const int gray = i % 256;
             const int alpha = fHasAlpha ? gray : 0xFF;
             SkColor colors[] = {