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

bench/ColorPrivBench.cpp

 #include "Benchmark.h"
 #include "SkColorPriv.h"
 #include "SkRandom.h"
 #include "SkString.h"
 
 template <bool kFast, bool kScale>
 class FourByteInterpBench : public Benchmark {
 public:
     FourByteInterpBench() {
         fName.set("four_byte_interp");
         fName.append(kFast ? "_fast" : "_slow");
         fName.append(kScale ? "_255" : "_256");
     }
 
-    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+    bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
     }
 
-    virtual const char* onGetName() SK_OVERRIDE { return fName.c_str(); }
+    const char* onGetName() SK_OVERRIDE { return fName.c_str(); }
 
-    virtual void onPreDraw() SK_OVERRIDE {
+    void onPreDraw() SK_OVERRIDE {
         // A handful of random srcs and dsts.
         SkRandom rand;
         for (int i = 0; i < kInputs; i++) {
             fSrcs[i] = SkPreMultiplyColor(rand.nextU());
             fDsts[i] = SkPreMultiplyColor(rand.nextU());
         }
 
         // We'll exhaustively test all scales instead of using random numbers.
         for (int i = 0; i <= 256; i++) {
             fScales[i] = i;
         }
         if (kScale) fScales[256] = 255;  // We'll just do 255 twice if we're limited to [0,255].
     }
 
-    virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
+    void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
         // We xor results of FourByteInterp into junk to make sure the function runs.
         volatile SkPMColor junk = 0;
 
         for (int loop = 0; loop < loops; loop++) {
             for (int i = 0; i < kInputs; i++) {
                 for (size_t j = 0; j <= 256; j++) {
                     // Note: we really want to load src and dst here and not outside in the i-loop.
                     // If we put the loads there, a clever compiler will do the not-insignificant
                     // work in the FourByteInterps that depends only on src and dst outside this
                     // loop, so we'd only be benchmarking the back half of those functions that also
@@ skipping 25 matching lines @@
     volatile unsigned fDsts[kInputs];
     unsigned fScales[257];  // We need space for [0, 256].
 };
 
 #define COMMA ,
 DEF_BENCH( return SkNEW(FourByteInterpBench<true COMMA true>); )
 DEF_BENCH( return SkNEW(FourByteInterpBench<true COMMA false>); )
 DEF_BENCH( return SkNEW(FourByteInterpBench<false COMMA true>); )
 DEF_BENCH( return SkNEW(FourByteInterpBench<false COMMA false>); )
 #undef COMMA