Fix up -Winconsistent-missing-override

bench/PictureNestingBench.cpp

 /*
  * Copyright 2014 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 "SkColor.h"
@@ skipping 95 matching lines @@
     typedef Benchmark INHERITED;
 };
 
 class PictureNestingRecording : public PictureNesting {
 public:
     PictureNestingRecording(int maxLevel, int maxPictureLevel)
         : INHERITED("recording", maxLevel, maxPictureLevel) {
     }
 
 protected:
-    virtual bool isSuitableFor(Backend backend) {
+    bool isSuitableFor(Backend backend) override {
         return backend == kNonRendering_Backend;
     }
 
-    virtual void onDraw(const int loops, SkCanvas*) {
+    void onDraw(const int loops, SkCanvas*) override {
         SkIPoint canvasSize = onGetSize();
         SkPictureRecorder recorder;
 
         for (int i = 0; i < loops; i++) {
             SkCanvas* c = recorder.beginRecording(SkIntToScalar(canvasSize.x()),
                                                   SkIntToScalar(canvasSize.y()));
             this->doDraw(c);
             SkAutoTUnref<SkPicture> picture(recorder.endRecording());
         }
     }
@@ skipping 13 matching lines @@
 
         SkIPoint canvasSize = onGetSize();
         SkPictureRecorder recorder;
         SkCanvas* c = recorder.beginRecording(SkIntToScalar(canvasSize.x()),
                                               SkIntToScalar(canvasSize.y()));
 
         this->doDraw(c);
         fPicture.reset(recorder.endRecording());
     }
 
-    virtual void onDraw(const int loops, SkCanvas* canvas) {
+    void onDraw(const int loops, SkCanvas* canvas) override {
         for (int i = 0; i < loops; i++) {
             canvas->drawPicture(fPicture);
         }
     }
 
 private:
     SkAutoTUnref<SkPicture> fPicture;
 
     typedef PictureNesting INHERITED;
 };
@@ skipping 10 matching lines @@
 
 DEF_BENCH( return new PictureNestingPlayback(8, 0); )
 DEF_BENCH( return new PictureNestingPlayback(8, 1); )
 DEF_BENCH( return new PictureNestingPlayback(8, 2); )
 DEF_BENCH( return new PictureNestingPlayback(8, 3); )
 DEF_BENCH( return new PictureNestingPlayback(8, 4); )
 DEF_BENCH( return new PictureNestingPlayback(8, 5); )
 DEF_BENCH( return new PictureNestingPlayback(8, 6); )
 DEF_BENCH( return new PictureNestingPlayback(8, 7); )
 DEF_BENCH( return new PictureNestingPlayback(8, 8); )