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

bench/ChecksumBench.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 "SkChecksum.h"
 #include "SkMD5.h"
@@ skipping 17 matching lines @@
     ChecksumType fType;
 
 public:
     ComputeChecksumBench(ChecksumType type) : fType(type) {
         SkRandom rand;
         for (int i = 0; i < U32COUNT; ++i) {
             fData[i] = rand.nextU();
         }
     }
 
-    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+    bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
     }
 
 protected:
     virtual const char* onGetName() {
         switch (fType) {
             case kChecksum_ChecksumType: return "compute_checksum";
             case kMD5_ChecksumType: return "compute_md5";
             case kSHA1_ChecksumType: return "compute_sha1";
             case kMurmur3_ChecksumType: return "compute_murmur3";
@@ skipping 39 matching lines @@
 private:
     typedef Benchmark INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_BENCH( return new ComputeChecksumBench(kChecksum_ChecksumType); )
 DEF_BENCH( return new ComputeChecksumBench(kMD5_ChecksumType); )
 DEF_BENCH( return new ComputeChecksumBench(kSHA1_ChecksumType); )
 DEF_BENCH( return new ComputeChecksumBench(kMurmur3_ChecksumType); )