bindings: Moves most of DOM attributes to prototype chains.

Source/bindings/scripts/v8_attributes.py

Index: Source/bindings/scripts/v8_attributes.py
diff --git a/Source/bindings/scripts/v8_attributes.py b/Source/bindings/scripts/v8_attributes.py
index 617bc3dfe7ee5627e600208fc0e4b34cf9c0045f..6d2f82bd4905c2b0120a46d6cd7b8d0204a8e92f 100644
--- a/Source/bindings/scripts/v8_attributes.py
+++ b/Source/bindings/scripts/v8_attributes.py
@@ -101,7 +101,7 @@ def attribute_context(interface, attribute):
         'is_call_with_script_state': v8_utilities.has_extended_attribute_value(attribute, 'CallWith', 'ScriptState'),
         'is_check_security_for_node': is_check_security_for_node,
         'is_custom_element_callbacks': is_custom_element_callbacks,
-        'is_expose_js_accessors': 'ExposeJSAccessors' in extended_attributes,
+        'is_expose_js_accessors': is_expose_js_accessors(interface, attribute),
         'is_getter_raises_exception':  # [RaisesException]
             'RaisesException' in extended_attributes and
             extended_attributes['RaisesException'] in (None, 'Getter'),
@@ -475,6 +475,34 @@ def has_custom_setter(attribute):
             extended_attributes['Custom'] in [None, 'Setter'])
 
 
+# [ExposeJSAccessors]
+def is_expose_js_accessors(interface, attribute):
+    extended_attributes = attribute.extended_attributes
+
+    # These attributes must not be accessors on prototype chains.
+    if (attribute.is_static or
+            'Unforgeable' in extended_attributes or
+            'OverrideBuiltins' in interface.extended_attributes):
+        return False
+
+    # FIXME: We should move all of the following DOM attributes to prototype
+    # chains.
+    if (is_constructor_attribute(attribute) or
+            has_custom_getter(attribute) or
+            has_custom_setter(attribute) or
+            interface.name == 'Window' or
+            interface.name == 'WorkerGlobalScope' or
+            v8_utilities.indexed_property_getter(interface) or
+            v8_utilities.indexed_property_setter(interface) or
+            v8_utilities.indexed_property_deleter(interface) or
+            v8_utilities.named_property_getter(interface) or
+            v8_utilities.named_property_setter(interface) or
+            v8_utilities.named_property_deleter(interface)):
+        return False
+
+    return True
+
+
 ################################################################################
 # Constructors
 ################################################################################