Remove Sk prefix from some bench classes.

tools/PictureBenchmark.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef PictureBenchmark_DEFINED
 #define PictureBenchmark_DEFINED
 
+#include "PictureRenderer.h"
+#include "PictureResultsWriter.h"
 #include "SkTypes.h"
-#include "PictureRenderer.h"
 #include "TimerData.h"
-#include "PictureResultsWriter.h"
 
 class BenchTimer;
-class SkBenchLogger;
 class SkPicture;
-class SkString;
 
 namespace sk_tools {
 
 class PictureBenchmark {
 public:
     PictureBenchmark();
 
     ~PictureBenchmark();
 
     /**
@@ skipping 38 matching lines @@
     bool              fPreprocess;
 
     PictureResultsWriter* fWriter;
 
     BenchTimer* setupTimer(bool useGLTimer = true);
 };
 
 }
 
 #endif  // PictureBenchmark_DEFINED