Remove Sk prefix from some bench classes.

bench/TextBench.cpp

Index: bench/TextBench.cpp
diff --git a/bench/TextBench.cpp b/bench/TextBench.cpp
index d32d0fd105f13d8c3f3db8964a3135a30bde860b..f150be2188df54238b1231ff9f2f5101295e5d29 100644
--- a/bench/TextBench.cpp
+++ b/bench/TextBench.cpp
@@ -5,7 +5,7 @@
  * 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 "SkFontHost.h"
 #include "SkPaint.h"
@@ -38,7 +38,7 @@ static const char* fontQualityName(const SkPaint& paint) {
         textencoding?
         text -vs- postext - pathtext
  */
-class TextBench : public SkBenchmark {
+class TextBench : public Benchmark {
     SkPaint     fPaint;
     SkString    fText;
     SkString    fName;
@@ -123,7 +123,7 @@ protected:
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////