Remove Sk prefix from some bench classes.

bench/RegionContainBench.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 "SkRandom.h"
 #include "SkRegion.h"
 #include "SkString.h"
 
 static bool sect_proc(SkRegion& a, SkRegion& b) {
     SkRegion result;
     return result.op(a, b, SkRegion::kIntersect_Op);
 }
 
-class RegionContainBench : public SkBenchmark {
+class RegionContainBench : public Benchmark {
 public:
     typedef bool (*Proc)(SkRegion& a, SkRegion& b);
     SkRegion fA, fB;
     Proc     fProc;
     SkString fName;
 
     enum {
         W = 200,
         H = 200,
         COUNT = 10,
@@ skipping 25 matching lines @@
 
     virtual void onDraw(const int loops, SkCanvas*) {
         Proc proc = fProc;
 
         for (int i = 0; i < loops; ++i) {
            proc(fA, fB);
         }
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 DEF_BENCH( return SkNEW_ARGS(RegionContainBench, (sect_proc, "sect")); )