Remove Sk prefix from some bench classes.

bench/InterpBench.cpp

-#include "SkBenchmark.h"
+#include "Benchmark.h"
 #include "SkColorPriv.h"
 #include "SkMatrix.h"
+#include "SkPaint.h"
 #include "SkRandom.h"
 #include "SkString.h"
-#include "SkPaint.h"
 
 #define TILE(x, width)  (((x) & 0xFFFF) * width >> 16)
 
-class InterpBench : public SkBenchmark {
+class InterpBench : public Benchmark {
     enum {
         kBuffer = 128,
         kLoop   = 20000
     };
     SkString    fName;
     int16_t     fDst[kBuffer];
     float       fFx, fDx;
 public:
     InterpBench(const char name[])  {
         fName.printf("interp_%s", name);
@@ skipping 15 matching lines @@
     }
 
     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;
+    typedef Benchmark INHERITED;
 };
 
 class Fixed16D16Interp : public InterpBench {
 public:
     Fixed16D16Interp() : INHERITED("16.16") {}
 
 protected:
     virtual void performTest(int16_t dst[], float fx, float dx, int count) SK_OVERRIDE {
         SkFixed curr = SkFloatToFixed(fx);
         SkFixed step = SkFloatToFixed(dx);
@@ skipping 97 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(); )