IDL: object type support for IDL dictionary

Source/bindings/scripts/v8_dictionary.py

Index: Source/bindings/scripts/v8_dictionary.py
diff --git a/Source/bindings/scripts/v8_dictionary.py b/Source/bindings/scripts/v8_dictionary.py
index cbe902b89658739b3d4a08a5c64fc86c1444442c..200356d7061ecfc080305dfa64562866fce2058d 100644
--- a/Source/bindings/scripts/v8_dictionary.py
+++ b/Source/bindings/scripts/v8_dictionary.py
@@ -32,6 +32,12 @@ def has_method_name_for_dictionary_member(member):
     return 'has%s' % v8_utilities.capitalize(member.name)
 
 
+def unwrap_nullable_if_needed(idl_type):
+    if idl_type.is_nullable:
+        return idl_type.inner_type
+    return idl_type
+
+
 # Context for V8 bindings
 
 def dictionary_context(dictionary):
@@ -50,11 +56,7 @@ def dictionary_context(dictionary):
 def member_context(member):
     idl_type = member.idl_type
     idl_type.add_includes_for_type()
-
-    def idl_type_for_default_value():
-        if idl_type.is_nullable:
-            return idl_type.inner_type
-        return idl_type
+    idl_type = unwrap_nullable_if_needed(idl_type)
 
     def default_values():
         if not member.default_value:
@@ -62,7 +64,7 @@ def member_context(member):
         if member.default_value.is_null:
             return None, 'v8::Null(isolate)'
         cpp_default_value = str(member.default_value)
-        v8_default_value = idl_type_for_default_value().cpp_value_to_v8_value(
+        v8_default_value = idl_type.cpp_value_to_v8_value(
             cpp_value=cpp_default_value, isolate='isolate',
             creation_context='creationContext')
         return cpp_default_value, v8_default_value
@@ -78,6 +80,7 @@ def member_context(member):
             extended_attributes=member.extended_attributes),
         'enum_validation_expression': idl_type.enum_validation_expression,
         'has_method_name': has_method_name_for_dictionary_member(member),
+        'is_object': idl_type.name == 'Object',
         'name': member.name,
         'setter_name': setter_name_for_dictionary_member(member),
         'v8_default_value': v8_default_value,
@@ -99,7 +102,8 @@ def dictionary_impl_context(dictionary, interfaces_info):
 
 
 def member_impl_context(member, interfaces_info, header_includes):
-    idl_type = member.idl_type
+    idl_type = unwrap_nullable_if_needed(member.idl_type)
+    is_object = idl_type.name == 'Object'
 
     def getter_expression():
         if idl_type.impl_should_use_nullable_container:
@@ -109,6 +113,8 @@ def member_impl_context(member, interfaces_info, header_includes):
     def has_method_expression():
         if idl_type.impl_should_use_nullable_container or idl_type.is_enum or idl_type.is_string_type:
             return '!m_%s.isNull()' % member.name
+        elif is_object:
+            return '!(m_{0}.isEmpty() || m_{0}.isNull() || m_{0}.isUndefined())'.format(member.name)
         else:
             return 'm_%s' % member.name
 
@@ -128,6 +134,7 @@ def member_impl_context(member, interfaces_info, header_includes):
         'getter_expression': getter_expression(),
         'has_method_expression': has_method_expression(),
         'has_method_name': has_method_name_for_dictionary_member(member),
+        'is_object': is_object,
         'is_traceable': (idl_type.is_garbage_collected or
                          idl_type.is_will_be_garbage_collected),
         'member_cpp_type': member_cpp_type(),