Implement icon attribute for menuitem

Source/core/page/CustomContextMenuProvider.cpp

Index: Source/core/page/CustomContextMenuProvider.cpp
diff --git a/Source/core/page/CustomContextMenuProvider.cpp b/Source/core/page/CustomContextMenuProvider.cpp
index d60fe9ebc9fc5b7b378263303cf794968c2c1629..1fbb11efb639a887105867fcbeeea01f1df5ea37 100644
--- a/Source/core/page/CustomContextMenuProvider.cpp
+++ b/Source/core/page/CustomContextMenuProvider.cpp
@@ -69,7 +69,7 @@ void CustomContextMenuProvider::appendSeparator(ContextMenu& contextMenu)
     if (lastItem.type() == SeparatorType)
         return;
 
-    contextMenu.appendItem(ContextMenuItem(SeparatorType, ContextMenuItemCustomTagNoAction, String()));
+    contextMenu.appendItem(ContextMenuItem(SeparatorType, ContextMenuItemCustomTagNoAction, String(), String()));
 }
 
 void CustomContextMenuProvider::appendMenuItem(HTMLMenuItemElement* menuItem, ContextMenu& contextMenu)
@@ -82,11 +82,18 @@ void CustomContextMenuProvider::appendMenuItem(HTMLMenuItemElement* menuItem, Co
     m_menuItems.append(menuItem);
 
     bool enabled = !menuItem->fastHasAttribute(disabledAttr);
+    String icon = menuItem->fastGetAttribute(iconAttr);
+    if (!icon.isEmpty()) {
+        // To obtain the absolute URL of the icon when the attribute's value is not the empty string,
+        // the attribute's value must be resolved relative to the element.
+        KURL iconURL = KURL(menuItem->baseURI(), icon);
+        icon = iconURL.string();
+    }
     ContextMenuAction action = static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + m_menuItems.size() - 1);
     if (equalIgnoringCase(menuItem->fastGetAttribute(typeAttr), "checkbox") || equalIgnoringCase(menuItem->fastGetAttribute(typeAttr), "radio"))
-        contextMenu.appendItem(ContextMenuItem(CheckableActionType, action, labelString, enabled, menuItem->fastHasAttribute(checkedAttr)));
+        contextMenu.appendItem(ContextMenuItem(CheckableActionType, action, labelString, icon, enabled, menuItem->fastHasAttribute(checkedAttr)));
     else
-        contextMenu.appendItem(ContextMenuItem(ActionType, action, labelString, enabled, false));
+        contextMenu.appendItem(ContextMenuItem(ActionType, action, labelString, icon, enabled, false));
 }
 
 void CustomContextMenuProvider::populateContextMenuItems(const HTMLMenuElement& menu, ContextMenu& contextMenu)
@@ -105,7 +112,7 @@ void CustomContextMenuProvider::populateContextMenuItems(const HTMLMenuElement&
                 appendSeparator(contextMenu);
             } else if (!labelString.isEmpty()) {
                 populateContextMenuItems(*toHTMLMenuElement(nextElement), subMenu);
-                contextMenu.appendItem(ContextMenuItem(SubmenuType, ContextMenuItemCustomTagNoAction, labelString, &subMenu));
+                contextMenu.appendItem(ContextMenuItem(SubmenuType, ContextMenuItemCustomTagNoAction, labelString, String(), &subMenu));
             }
             nextElement = Traversal<HTMLElement>::nextSibling(*nextElement);
         } else if (isHTMLMenuItemElement(*nextElement)) {