Remove Sk prefix from some bench classes.

bench/WritePixelsBench.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#include "SkBenchmark.h"
+#include "Benchmark.h"
 #include "SkCanvas.h"
 #include "SkString.h"
 
-class WritePixelsBench : public SkBenchmark {
+class WritePixelsBench : public Benchmark {
 public:
     WritePixelsBench(SkColorType ct, SkAlphaType at)
         : fColorType(ct)
         , fAlphaType(at)
         , fName("writepix")
     {
         switch (ct) {
             case kRGBA_8888_SkColorType:
                 fName.append("_RGBA");
                 break;
@@ skipping 38 matching lines @@
         for (int loop = 0; loop < loops; ++loop) {
             canvas->writePixels(info, bmp.getPixels(), bmp.rowBytes(), 0, 0);
         }
     }
 
 private:
     SkColorType fColorType;
     SkAlphaType fAlphaType;
     SkString    fName;
 
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_BENCH( return SkNEW_ARGS(WritePixelsBench, (kRGBA_8888_SkColorType, kPremul_SkAlphaType)); )
 DEF_BENCH( return SkNEW_ARGS(WritePixelsBench, (kRGBA_8888_SkColorType, kUnpremul_SkAlphaType)); )