Remove Sk prefix from some bench classes.

bench/Matrix44Bench.cpp

Index: bench/Matrix44Bench.cpp
diff --git a/bench/Matrix44Bench.cpp b/bench/Matrix44Bench.cpp
index 55f377cb0370e493ac899fed74489b682eb79752..8a7c50e6068ea22b96a19ed6de2410a320be15bb 100644
--- a/bench/Matrix44Bench.cpp
+++ b/bench/Matrix44Bench.cpp
@@ -5,12 +5,12 @@
  * found in the LICENSE file.
  */
 
-#include "SkBenchmark.h"
+#include "Benchmark.h"
 #include "SkMatrix44.h"
 #include "SkRandom.h"
 #include "SkString.h"
 
-class Matrix44Bench : public SkBenchmark {
+class Matrix44Bench : public Benchmark {
     SkString    fName;
 public:
     Matrix44Bench(const char name[]) {
@@ -37,7 +37,7 @@ protected:
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 class EqualsMatrix44Bench : public Matrix44Bench {