Suppress cloning EventTarget methods in subtypes when using blink

tools/dom/scripts/database.py

Index: tools/dom/scripts/database.py
diff --git a/tools/dom/scripts/database.py b/tools/dom/scripts/database.py
index 624ad004688a0b30679e8477613fd889a4551200..b5e4df92a8e4ab7c909e77d9066e74a01bab7135 100755
--- a/tools/dom/scripts/database.py
+++ b/tools/dom/scripts/database.py
@@ -247,7 +247,7 @@ class Database(object):
   def AddEnum(self, enum):
     self._enums[enum.id] = enum
 
-  def TransitiveSecondaryParents(self, interface):
+  def TransitiveSecondaryParents(self, interface, propagate_event_target):
     """Returns a list of all non-primary parents.
 
     The list contains the interface objects for interfaces defined in the
@@ -267,7 +267,8 @@ class Database(object):
     result = []
     if interface.parents:
       parent = interface.parents[0]
-      if IsPureInterface(parent.type.id) or parent.type.id == 'EventTarget':
+      if (IsPureInterface(parent.type.id) or
+          (propagate_event_target and parent.type.id == 'EventTarget')):
         walk(interface.parents)
       else:
         walk(interface.parents[1:])