Implement navigator.languages.

Source/core/frame/NavigatorLanguage.cpp

Index: Source/core/frame/NavigatorLanguage.cpp
diff --git a/Source/core/frame/NavigatorLanguage.cpp b/Source/core/frame/NavigatorLanguage.cpp
index c3765f500fc797d596d65c24cccb21fdb933f028..ad520541539e59743d64d55b07ae1a87d48346c2 100644
--- a/Source/core/frame/NavigatorLanguage.cpp
+++ b/Source/core/frame/NavigatorLanguage.cpp
@@ -9,10 +9,29 @@
 
 namespace WebCore {
 
+NavigatorLanguage::NavigatorLanguage()
+    : m_languagesChanged(true)
+{
+}
+
 AtomicString NavigatorLanguage::language(bool& isNull)
 {
     isNull = false;
     return defaultLanguage();
 }
 
+bool NavigatorLanguage::hasLanguagesChanged()
+{
+    if (!m_languagesChanged)
+        return false;
+
+    m_languagesChanged = false;
+    return true;
+}
+
+void NavigatorLanguage::setLanguagesChanged()
+{
+    m_languagesChanged = true;
+}
+
 } // namespace WebCore