Remove Sk prefix from some bench classes.

bench/ColorFilterBench.cpp

Index: bench/ColorFilterBench.cpp
diff --git a/bench/ColorFilterBench.cpp b/bench/ColorFilterBench.cpp
index 3d9515477c7e52b222db7c2785028d766f35f2ad..7eae21aa7572ac2555f6c308516ead07f944cda7 100644
--- a/bench/ColorFilterBench.cpp
+++ b/bench/ColorFilterBench.cpp
@@ -4,7 +4,7 @@
  * 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 "SkColorFilterImageFilter.h"
 #include "SkColorMatrixFilter.h"
@@ -16,7 +16,7 @@
 #define FILTER_WIDTH_LARGE  SkIntToScalar(256)
 #define FILTER_HEIGHT_LARGE SkIntToScalar(256)
 
-class ColorFilterBaseBench : public SkBenchmark {
+class ColorFilterBaseBench : public Benchmark {
 
 public:
     ColorFilterBaseBench(bool small) : fIsSmall(small) { }
@@ -58,7 +58,7 @@ protected:
 private:
     bool fIsSmall;
 
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 class ColorFilterDimBrightBench : public ColorFilterBaseBench {