Remove Sk prefix from some bench classes.

This idea came while commenting on
https://codereview.chromium.org/343583005/

Since SkBenchmark, SkBenchLogger and SkGMBench are not part of the Skia library,
they should not have the Sk prefix.

BUG=None
TEST=make all
R=mtklein@google.com

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/347823004
diff --git a/bench/RefCntBench.cpp b/bench/RefCntBench.cpp
index b7a111b..351513b 100644
--- a/bench/RefCntBench.cpp
+++ b/bench/RefCntBench.cpp
@@ -4,17 +4,17 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#include "SkBenchmark.h"
+#include <memory>
+#include "Benchmark.h"
 #include "SkRefCnt.h"
 #include "SkThread.h"
 #include "SkWeakRefCnt.h"
-#include <memory>
 
 enum {
     M = 2
 };
 
-class RefCntBench_Stack : public SkBenchmark {
+class RefCntBench_Stack : public Benchmark {
 public:
     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
@@ -36,7 +36,7 @@
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 class PlacedRefCnt : public SkRefCnt {
@@ -50,7 +50,7 @@
     typedef SkRefCnt INHERITED;
 };
 
-class RefCntBench_Heap : public SkBenchmark {
+class RefCntBench_Heap : public Benchmark {
 public:
     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
@@ -74,10 +74,10 @@
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
-class RefCntBench_New : public SkBenchmark {
+class RefCntBench_New : public Benchmark {
 public:
     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
@@ -100,12 +100,12 @@
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
-class WeakRefCntBench_Stack : public SkBenchmark {
+class WeakRefCntBench_Stack : public Benchmark {
 public:
     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
@@ -127,7 +127,7 @@
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 class PlacedWeakRefCnt : public SkWeakRefCnt {
@@ -136,7 +136,7 @@
     void operator delete(void*) { }
 };
 
-class WeakRefCntBench_Heap : public SkBenchmark {
+class WeakRefCntBench_Heap : public Benchmark {
 public:
     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
@@ -160,10 +160,10 @@
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
-class WeakRefCntBench_New : public SkBenchmark {
+class WeakRefCntBench_New : public Benchmark {
 public:
     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
@@ -186,7 +186,7 @@
     }
 
 private:
-    typedef SkBenchmark INHERITED;
+    typedef Benchmark INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////