LibHTML: Load image resource when src attribute is set

Author: https://github.com/deoxxa
Commit: 1ef53be2f3
Pull-request: https://github.com/SerenityOS/serenity/pull/634

Libraries/LibHTML/DOM/HTMLImageElement.h

@@ -8,12 +8,16 @@ public:
     HTMLImageElement(Document&, const String& tag_name);
     virtual ~HTMLImageElement() override;
 
+    virtual void parse_attribute(const String& name, const String& value) override;
+
     String alt() const { return attribute("alt"); }
     String src() const { return attribute("src"); }
 
     const GraphicsBitmap* bitmap() const;
 
 private:
+    void load_image(const String& src);
+
     virtual RefPtr<LayoutNode> create_layout_node(const StyleResolver&, const StyleProperties* parent_style) const override;
 
     mutable RefPtr<GraphicsBitmap> m_bitmap;