Fix virtual/override/final usage in Source/platform/.

Source/platform/graphics/StaticBitmapPattern.h

Index: Source/platform/graphics/StaticBitmapPattern.h
diff --git a/Source/platform/graphics/StaticBitmapPattern.h b/Source/platform/graphics/StaticBitmapPattern.h
index 1687c30fa61d7c1adb168415d4cdd20e39bb68e7..89a3eb8ab64ee9d88500518908e6c1f2e6739cdf 100644
--- a/Source/platform/graphics/StaticBitmapPattern.h
+++ b/Source/platform/graphics/StaticBitmapPattern.h
@@ -13,13 +13,13 @@ class PLATFORM_EXPORT StaticBitmapPattern : public BitmapPatternBase {
 public:
     static PassRefPtr<Pattern> create(PassRefPtr<Image> tileImage, RepeatMode);
 
-    virtual ~StaticBitmapPattern();
+    ~StaticBitmapPattern() override;
 
 protected:
-    virtual PassRefPtr<SkShader> createShader() override;
+    PassRefPtr<SkShader> createShader() override;
 
-    virtual SkImageInfo getBitmapInfo() override;
-    virtual void drawBitmapToCanvas(SkCanvas&, SkPaint&) override;
+    SkImageInfo getBitmapInfo() override;
+    void drawBitmapToCanvas(SkCanvas&, SkPaint&) override;
 
 private:
     StaticBitmapPattern(PassRefPtr<SkImage>, RepeatMode);