Revert of bindings: Makes almost all attributes accessor-type properties.

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 6a96a75e31cb48ddbcf86843ec79dabfb867636e..b1f72a0a9abc82ea9cd6e55ebaeed43c84fafa39 100644
--- a/Source/bindings/scripts/v8_attributes.py
+++ b/Source/bindings/scripts/v8_attributes.py
@@ -65,11 +65,6 @@
         not is_do_not_check_security)
     if is_check_security_for_frame or is_check_security_for_node or is_check_security_for_window:
         includes.add('bindings/core/v8/BindingSecurity.h')
-    # [Constructor]
-    # TODO(yukishiino): Constructors are much like methods although constructors
-    # are not methods.  Constructors must be data-type properties, and we can
-    # support them as a kind of methods.
-    constructor_type = idl_type.constructor_type_name if is_constructor_attribute(attribute) else None
     # [CustomElementCallbacks], [Reflect]
     is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
     is_reflect = 'Reflect' in extended_attributes
@@ -105,7 +100,8 @@
         'argument_cpp_type': idl_type.cpp_type_args(used_as_rvalue_type=True),
         'cached_attribute_validation_method': cached_attribute_validation_method,
         'conditional_string': v8_utilities.conditional_string(attribute),
-        'constructor_type': constructor_type,
+        'constructor_type': idl_type.constructor_type_name
+                            if is_constructor_attribute(attribute) else None,
         'cpp_name': cpp_name(attribute),
         'cpp_type': idl_type.cpp_type,
         'cpp_type_initializer': idl_type.cpp_type_initializer,
@@ -123,8 +119,7 @@
         'is_check_security_for_node': is_check_security_for_node,
         'is_check_security_for_window': is_check_security_for_window,
         'is_custom_element_callbacks': is_custom_element_callbacks,
-        # TODO(yukishiino): Make all DOM attributes accessor-type properties.
-        'is_data_type_property': constructor_type or interface.name == 'Window',
+        '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'),
@@ -494,6 +489,43 @@
             extended_attributes['Custom'] in [None, 'Setter'])
 
 
+# [ExposeJSAccessors]
+def is_expose_js_accessors(interface, attribute):
+    # Default behavior
+    is_accessor = True
+
+    if ('ExposeJSAccessors' in interface.extended_attributes and
+            'DoNotExposeJSAccessors' in interface.extended_attributes):
+        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time in an interface: ' + interface.name)
+    if 'ExposeJSAccessors' in interface.extended_attributes:
+        is_accessor = True
+    if 'DoNotExposeJSAccessors' in interface.extended_attributes:
+        is_accessor = False
+
+    # Note that ExposeJSAccessors and DoNotExposeJSAccessors are more powerful
+    # than 'static', [Unforgeable] and [OverrideBuiltins].
+    if ('ExposeJSAccessors' in attribute.extended_attributes and
+            'DoNotExposeJSAccessors' in attribute.extended_attributes):
+        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time on an attribute: ' + attribute.name + ' in an interface: ' + interface.name)
+    if 'ExposeJSAccessors' in attribute.extended_attributes:
+        return True
+    if 'DoNotExposeJSAccessors' in attribute.extended_attributes:
+        return False
+
+    # These attributes must not be accessors on prototype chains.
+    if (is_constructor_attribute(attribute) or
+            attribute.is_static or
+            is_unforgeable(interface, attribute) or
+            'OverrideBuiltins' in interface.extended_attributes):
+        return False
+
+    # The members of Window interface must be placed on the instance object.
+    if interface.name == 'Window':
+        return False
+
+    return is_accessor
+
+
 ################################################################################
 # Constructors
 ################################################################################