Standardize usage of virtual/override/final in cc/

cc/quads/solid_color_draw_quad.h

Index: cc/quads/solid_color_draw_quad.h
diff --git a/cc/quads/solid_color_draw_quad.h b/cc/quads/solid_color_draw_quad.h
index 256cc5269ba46b398f14d45d6f1540755f3c1a83..f70e5e3ae6ca3648fe9f12db89876777f78dfbf5 100644
--- a/cc/quads/solid_color_draw_quad.h
+++ b/cc/quads/solid_color_draw_quad.h
@@ -33,13 +33,12 @@ class CC_EXPORT SolidColorDrawQuad : public DrawQuad {
   SkColor color;
   bool force_anti_aliasing_off;
 
-  virtual void IterateResources(const ResourceIteratorCallback& callback)
-      override;
+  void IterateResources(const ResourceIteratorCallback& callback) override;
 
   static const SolidColorDrawQuad* MaterialCast(const DrawQuad*);
 
  private:
-  virtual void ExtendValue(base::debug::TracedValue* value) const override;
+  void ExtendValue(base::debug::TracedValue* value) const override;
 };
 
 }  // namespace cc