Make pair iterators inherit from %IteratorPrototype%.

third_party/WebKit/Source/bindings/scripts/v8_interface.py

Index: third_party/WebKit/Source/bindings/scripts/v8_interface.py
diff --git a/third_party/WebKit/Source/bindings/scripts/v8_interface.py b/third_party/WebKit/Source/bindings/scripts/v8_interface.py
index ec4dfe7974b1614fe9525a6e1b697a46b23c44cb..2911ce892e5976f551f60945af61b43cc649b061 100644
--- a/third_party/WebKit/Source/bindings/scripts/v8_interface.py
+++ b/third_party/WebKit/Source/bindings/scripts/v8_interface.py
@@ -507,7 +507,7 @@ def methods_context(interface):
             argument.extended_attributes.update(extended_attributes)
         return argument
 
-    # [Iterable], iterable<>, maplike<> and setlike<>
+    # iterable<>, maplike<> and setlike<>
     iterator_method = None
 
     # FIXME: support Iterable in partial interfaces. However, we don't
@@ -516,8 +516,7 @@ def methods_context(interface):
     # http://heycam.github.io/webidl/#idl-overloading
     if (not interface.is_partial and (
             interface.iterable or interface.maplike or interface.setlike or
-            interface.has_indexed_elements or
-            'Iterable' in interface.extended_attributes)):
+            interface.has_indexed_elements)):
 
         used_extended_attributes = {}