Simplify benchmark internal API.

bench/InterpBench.cpp

 #include "SkBenchmark.h"
 #include "SkColorPriv.h"
 #include "SkMatrix.h"
 #include "SkRandom.h"
 #include "SkString.h"
 #include "SkPaint.h"
 
 #define TILE(x, width)  (((x) & 0xFFFF) * width >> 16)
 
 class InterpBench : public SkBenchmark {
@@ skipping 17 matching lines @@
 
     virtual void performTest(int16_t dst[], float x, float dx, int count) = 0;
 
 protected:
     virtual int mulLoopCount() const { return 1; }
 
     virtual const char* onGetName() {
         return fName.c_str();
     }
 
-    virtual void onDraw(SkCanvas*) {
-        int n = this->getLoops() * this->mulLoopCount();
+    virtual void onDraw(const int loops, SkCanvas*) {
+        int n = loops * this->mulLoopCount();
         for (int i = 0; i < n; i++) {
             this->performTest(fDst, fFx, fDx, kBuffer);
         }
     }
 
 private:
     typedef SkBenchmark INHERITED;
 };
 
 class Fixed16D16Interp : public InterpBench {
@@ skipping 104 matching lines @@
     typedef InterpBench INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_BENCH( return new Fixed16D16Interp(); )
 DEF_BENCH( return new Fixed32D32Interp(); )
 DEF_BENCH( return new Fixed16D48Interp(); )
 DEF_BENCH( return new FloatInterp(); )
 DEF_BENCH( return new DoubleInterp(); )