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/DeferredSurfaceCopyBench.cpp b/bench/DeferredSurfaceCopyBench.cpp
index 91b34a9..7130780 100644
--- a/bench/DeferredSurfaceCopyBench.cpp
+++ b/bench/DeferredSurfaceCopyBench.cpp
@@ -31,7 +31,7 @@
             "DeferredSurfaceCopy_nonDiscardable";
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         // The canvas is not actually used for this test except to provide
         // configuration information: gpu, multisampling, size, etc?
         SkImageInfo info;
@@ -55,7 +55,7 @@
         SkAutoTUnref<SkDeferredCanvas> drawingCanvas(SkDeferredCanvas::Create(surface));
         surface->unref();
 
-        for (int iteration = 0; iteration < this->getLoops(); iteration++) {
+        for (int iteration = 0; iteration < loops; iteration++) {
             drawingCanvas->clear(0);
             SkAutoTUnref<SkImage> image(drawingCanvas->newImageSnapshot());
             SkPaint paint;