Remove Sk prefix from some bench classes.

bench/ChromeBench.cpp

 /*
  * Copyright 2011 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 "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkString.h"
 
 /**
    Benchmarks that try to emulate a particular Skia call pattern observed in Chrome.
 */
 
 /// blitRect() calls emitted by Chrome while scrolling through gmail: count, width, height.
 int gmailScrollingRectSpec [431*3] = {
@@ skipping 424 matching lines @@
   17664, 198, 1,
   17664, 25, 1,
   17664, 2, 1,
   17664, 599, 1,
   17664, 90, 1,
   17710, 24, 1,
   35328, 26, 1,
 };
 
 /// Emulates the mix of rects blitted by gmail during scrolling
-class ScrollGmailBench : public SkBenchmark {
+class ScrollGmailBench : public Benchmark {
     enum {
         W = 1254,
         H = 1160,
         N = 431
     };
 public:
     ScrollGmailBench()  { }
 
 protected:
 
@@ skipping 18 matching lines @@
     }
     void validateBounds(SkCanvas* canvas) {
         SkIRect bounds;
         canvas->getClipDeviceBounds(&bounds);
         SkASSERT(bounds.right()-bounds.left() >= W);
         SkASSERT(bounds.bottom()-bounds.top() >= H);
     }
 
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 // Disabled this benchmark: it takes 15x longer than any other benchmark
 // and is probably not giving us important information.
 // DEF_BENCH(return SkNEW(ScrollGmailBench));