Bug 742167. Give extendedAttribute() a better name. r=khuey

dom/bindings/Codegen.py

@@ -604,7 +604,7 @@ class CGClassHasInstanceHook(CGAbstractStaticMethod):
 """ % (self.descriptor.name, self.descriptor.hasInstanceInterface)
 
 def isChromeOnly(m):
-    return m.extendedAttribute("ChromeOnly")
+    return m.getExtendedAttribute("ChromeOnly")
 
 class PropertyDefiner:
     """

dom/bindings/parser/WebIDL.py

@@ -1340,7 +1340,7 @@ class IDLInterfaceMember(IDLObjectWithIdentifier):
     def handleExtendedAttribute(self, name, list):
         pass
 
-    def extendedAttribute(self, name):
+    def getExtendedAttribute(self, name):
         return self._extendedAttrDict.get(name, None)
 
 class IDLConst(IDLInterfaceMember):