1 files changed, 49 insertions, 0 deletions
diff --git a/WebKit/chromium/src/DOMUtilitiesPrivate.cpp b/WebKit/chromium/src/DOMUtilitiesPrivate.cpp
index ffdd85d..4081db6 100644
--- a/WebKit/chromium/src/DOMUtilitiesPrivate.cpp
+++ b/WebKit/chromium/src/DOMUtilitiesPrivate.cpp
@@ -84,4 +84,53 @@ String nameOfInputElement(HTMLInputElement* element)
     return WebInputElement(element).nameForAutofill();
 }
 
+bool elementHasLegalLinkAttribute(const Element* element,
+                                  const QualifiedName& attrName)
+{
+    if (attrName == HTMLNames::srcAttr) {
+        // Check src attribute.
+        if (element->hasTagName(HTMLNames::imgTag)
+            || element->hasTagName(HTMLNames::scriptTag)
+            || element->hasTagName(HTMLNames::iframeTag)
+            || element->hasTagName(HTMLNames::frameTag))
+            return true;
+        if (element->hasTagName(HTMLNames::inputTag)) {
+            const HTMLInputElement* input =
+            static_cast<const HTMLInputElement*>(element);
+            if (input->inputType() == HTMLInputElement::IMAGE)
+                return true;
+        }
+    } else if (attrName == HTMLNames::hrefAttr) {
+        // Check href attribute.
+        if (element->hasTagName(HTMLNames::linkTag)
+            || element->hasTagName(HTMLNames::aTag)
+            || element->hasTagName(HTMLNames::areaTag))
+            return true;
+    } else if (attrName == HTMLNames::actionAttr) {
+        if (element->hasTagName(HTMLNames::formTag))
+            return true;
+    } else if (attrName == HTMLNames::backgroundAttr) {
+        if (element->hasTagName(HTMLNames::bodyTag)
+            || element->hasTagName(HTMLNames::tableTag)
+            || element->hasTagName(HTMLNames::trTag)
+            || element->hasTagName(HTMLNames::tdTag))
+            return true;
+    } else if (attrName == HTMLNames::citeAttr) {
+        if (element->hasTagName(HTMLNames::blockquoteTag)
+            || element->hasTagName(HTMLNames::qTag)
+            || element->hasTagName(HTMLNames::delTag)
+            || element->hasTagName(HTMLNames::insTag))
+            return true;
+    } else if (attrName == HTMLNames::classidAttr
+               || attrName == HTMLNames::dataAttr) {
+        if (element->hasTagName(HTMLNames::objectTag))
+            return true;
+    } else if (attrName == HTMLNames::codebaseAttr) {
+        if (element->hasTagName(HTMLNames::objectTag)
+            || element->hasTagName(HTMLNames::appletTag))
+            return true;
+    }
+    return false;
+}
+
 } // namespace WebKit