Rework static method support.

lib/dom/scripts/dartgenerator.py

Index: lib/dom/scripts/dartgenerator.py
diff --git a/lib/dom/scripts/dartgenerator.py b/lib/dom/scripts/dartgenerator.py
index 887eedc3c8f475d7f4af1a8e49d944a2e90b302e..250583230c9306774143010d028afe99a9131624 100755
--- a/lib/dom/scripts/dartgenerator.py
+++ b/lib/dom/scripts/dartgenerator.py
@@ -423,7 +423,10 @@ class DartGenerator(object):
       operations = operationsById[id]
       info = AnalyzeOperation(interface, operations)
       for generator in generators:
-        generator.AddOperation(info)
+        if info.IsStatic():
+          generator.AddStaticOperation(info)
+        else:
+          generator.AddOperation(info)
 
     # With multiple inheritance, attributes and operations of non-first
     # interfaces need to be added.  Sometimes the attribute or operation is
@@ -638,5 +641,8 @@ class DummyInterfaceGenerator(object):
   def AddOperation(self, info):
     pass
 
+  def AddStaticOperation(self, info):
+    pass
+
   def AddEventAttributes(self, event_attrs):
     pass