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/MemoryBench.cpp b/bench/MemoryBench.cpp
index e3ac2c3..19919ab 100644
--- a/bench/MemoryBench.cpp
+++ b/bench/MemoryBench.cpp
@@ -30,14 +30,14 @@
         return fName.c_str();
     }
 
-    virtual void onDraw(SkCanvas*) SK_OVERRIDE {
+    virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
         size_t inc = fMinSize >> 4;
         SkASSERT(inc > 0);
         size_t total = fMinSize * 64;
 
         SkChunkAlloc alloc(fMinSize);
 
-        for (int i = 0; i < this->getLoops(); ++i) {
+        for (int i = 0; i < loops; ++i) {
             size_t size = 0;
             int calls = 0;
             while (size < total) {
@@ -99,8 +99,8 @@
         return fName.c_str();
     }
 
-    virtual void onDraw(SkCanvas*) SK_OVERRIDE {
-        for (int i = 0; i < this->getLoops(); i++) {
+    virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
+        for (int i = 0; i < loops; i++) {
             int* zeros = fUseCalloc ? calloc(fNum) : malloc_bzero(fNum);
             if (fRead) {
                 volatile int x = 15;