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/RTreeBench.cpp b/bench/RTreeBench.cpp
index 6991b3f..b51cc4c 100644
--- a/bench/RTreeBench.cpp
+++ b/bench/RTreeBench.cpp
@@ -47,9 +47,9 @@
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         SkRandom rand;
-        for (int i = 0; i < this->getLoops(); ++i) {
+        for (int i = 0; i < loops; ++i) {
             for (int j = 0; j < NUM_BUILD_RECTS; ++j) {
                 fTree->insert(reinterpret_cast<void*>(j), fProc(rand, j, NUM_BUILD_RECTS),
                               fBulkLoad);
@@ -111,9 +111,9 @@
         fTree->flushDeferredInserts();
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         SkRandom rand;
-        for (int i = 0; i < this->getLoops(); ++i) {
+        for (int i = 0; i < loops; ++i) {
             SkTDArray<void*> hits;
             SkIRect query;
             switch(fQuery) {