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

Source/platform/graphics/filters/FEFlood.h

Index: Source/platform/graphics/filters/FEFlood.h
diff --git a/Source/platform/graphics/filters/FEFlood.h b/Source/platform/graphics/filters/FEFlood.h
index ca5cdb6757e6901bb321e161e032a374d6f4ca93..bfbaf872bc8e1a2980290551f5d831ccee59fcd2 100644
--- a/Source/platform/graphics/filters/FEFlood.h
+++ b/Source/platform/graphics/filters/FEFlood.h
@@ -40,11 +40,11 @@ public:
 
     // feFlood does not perform color interpolation of any kind, so the result is always in the current
     // color space regardless of the value of color-interpolation-filters.
-    virtual void setOperatingColorSpace(ColorSpace) override { }
+    void setOperatingColorSpace(ColorSpace) override { }
 
-    virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) override;
+    PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) override;
 
-    virtual TextStream& externalRepresentation(TextStream&, int indention) const override;
+    TextStream& externalRepresentation(TextStream&, int indention) const override;
 
 private:
     FEFlood(Filter*, const Color&, float);