Fix up all the easy virtual ... SK_OVERRIDE cases.

bench/MemoryBench.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Benchmark.h"
 #include "SkCanvas.h"
 #include "SkChunkAlloc.h"
 #include "SkPaint.h"
 #include "SkRandom.h"
 #include "SkString.h"
 
 class ChunkAllocBench : public Benchmark {
     SkString    fName;
     size_t      fMinSize;
 public:
     ChunkAllocBench(size_t minSize)  {
         fMinSize = minSize;
         fName.printf("chunkalloc_" SK_SIZE_T_SPECIFIER, minSize);
     }
 
-    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+    bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
     }
 
 protected:
-    virtual const char* onGetName() SK_OVERRIDE {
+    const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }
 
-    virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
+    void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
         size_t inc = fMinSize >> 4;
         SkASSERT(inc > 0);
         size_t total = fMinSize * 64;
 
         SkChunkAlloc alloc(fMinSize);
 
         for (int i = 0; i < loops; ++i) {
             size_t size = 0;
             int calls = 0;
             while (size < total) {
                 alloc.allocThrow(inc);
                 size += inc;
                 calls += 1;
             }
             alloc.reset();
         }
     }
 
 private:
     typedef Benchmark INHERITED;
 };
 
 DEF_BENCH( return new ChunkAllocBench(64); )
 DEF_BENCH( return new ChunkAllocBench(8*1024); )