LibWeb: Support accent-color for range input and progress element

Fixes #466

(cherry picked from commit 9df8e1f22468884db353f55d10823cd3d15c511b)

Userland/Libraries/LibWeb/HTML/HTMLInputElement.h

@@ -212,6 +212,7 @@ private:
 
     // ^DOM::Element
     virtual i32 default_tab_index_value() const override;
+    virtual void computed_css_values_changed() override;
 
     // https://html.spec.whatwg.org/multipage/input.html#image-button-state-(type=image):dimension-attributes
     virtual bool supports_dimension_attributes() const override { return type_state() == TypeAttributeState::ImageButton; }