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/TableBench.cpp b/bench/TableBench.cpp
index 0646d26..ce5c3d2 100644
--- a/bench/TableBench.cpp
+++ b/bench/TableBench.cpp
@@ -33,14 +33,14 @@
         return "tablebench";
     }
 
-    virtual void onDraw(SkCanvas* canvas) {
+    virtual void onDraw(const int loops, SkCanvas* canvas) {
         SkPaint cellPaint;
         cellPaint.setColor(0xFFFFFFF);
 
         SkPaint borderPaint;
         borderPaint.setColor(0xFFCCCCCC);
 
-        for (int i = 0; i < this->getLoops(); ++i) {
+        for (int i = 0; i < loops; ++i) {
             for (int row = 0; row < kNumRows; ++row) {
                 for (int col = 0; col < kNumCols; ++col) {
                     SkRect cell = SkRect::MakeLTRB(col * kCellWidth,