IDL: Add toRestricted{Float,Double}() helpers to V8Binding.h

Source/bindings/scripts/v8_dictionary.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Generate template contexts of dictionaries for both v8 bindings and
 implementation classes that are used by blink's core/modules.
 """
 
 import operator
 from idl_types import IdlType
 from v8_globals import includes
 import v8_types
 import v8_utilities
+from v8_utilities import has_extended_attribute_value
 
 
 DICTIONARY_H_INCLUDES = frozenset([
     'bindings/core/v8/ToV8.h',
     'bindings/core/v8/V8Binding.h',
     'platform/heap/Handle.h',
 ])
 
 DICTIONARY_CPP_INCLUDES = frozenset([
     'bindings/core/v8/ExceptionState.h',
@@ skipping 25 matching lines @@
 
 # Context for V8 bindings
 
 def dictionary_context(dictionary, interfaces_info):
     includes.clear()
     includes.update(DICTIONARY_CPP_INCLUDES)
     cpp_class = v8_utilities.cpp_name(dictionary)
     context = {
         'cpp_class': cpp_class,
         'header_includes': set(DICTIONARY_H_INCLUDES),
-        'members': [member_context(member)
+        'members': [member_context(dictionary, member)
                     for member in sorted(dictionary.members,
                                          key=operator.attrgetter('name'))],
         'use_permissive_dictionary_conversion': 'PermissiveDictionaryConversion' in dictionary.extended_attributes,
         'v8_class': v8_types.v8_type(cpp_class),
         'v8_original_class': v8_types.v8_type(dictionary.name),
     }
     if dictionary.parent:
         IdlType(dictionary.parent).add_includes_for_type()
         parent_cpp_class = v8_utilities.cpp_name_from_interfaces_info(
             dictionary.parent, interfaces_info)
         context.update({
             'parent_cpp_class': parent_cpp_class,
             'parent_v8_class': v8_types.v8_type(parent_cpp_class),
         })
     return context
 
 
-def member_context(member):
+def member_context(dictionary, member):
     idl_type = member.idl_type
     idl_type.add_includes_for_type()
     unwrapped_idl_type = unwrap_nullable_if_needed(idl_type)
 
+    restricted_float = (
+        has_extended_attribute_value(dictionary, 'TypeChecking', 'Unrestricted') or
+        has_extended_attribute_value(member, 'TypeChecking', 'Unrestricted'))
+
     def default_values():
         if not member.default_value:
             return None, None
         if member.default_value.is_null:
             return None, 'v8::Null(isolate)'
         cpp_default_value = str(member.default_value)
         v8_default_value = unwrapped_idl_type.cpp_value_to_v8_value(
             cpp_value=cpp_default_value, isolate='isolate',
             creation_context='creationContext')
         return cpp_default_value, v8_default_value
@@ skipping 16 matching lines @@
         'is_interface_type': idl_type.is_interface_type and not idl_type.is_dictionary,
         'is_nullable': idl_type.is_nullable,
         'is_object': unwrapped_idl_type.name == 'Object',
         'name': member.name,
         'setter_name': setter_name_for_dictionary_member(member),
         'null_setter_name': null_setter_name_for_dictionary_member(member),
         'use_output_parameter_for_result': unwrapped_idl_type.use_output_parameter_for_result,
         'v8_default_value': v8_default_value,
         'v8_value_to_local_cpp_value': unwrapped_idl_type.v8_value_to_local_cpp_value(
             member.extended_attributes, member.name + 'Value',
-            member.name, isolate='isolate'),
+            member.name, isolate='isolate', restricted_float=restricted_float),
     }
 
 
 # Context for implementation classes
 
 def dictionary_impl_context(dictionary, interfaces_info):
     def remove_duplicate_members(members):
         # When [ImplementedAs] is used, cpp_name can conflict. For example,
         # dictionary D { long foo; [ImplementedAs=foo, DeprecateAs=Foo] long oldFoo; };
         # This function removes such duplications, checking they have the same type.
@@ skipping 61 matching lines @@
         '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_traceable,
         'member_cpp_type': member_cpp_type(),
         'null_setter_name': null_setter_name_for_dictionary_member(member),
         'rvalue_cpp_type': idl_type.cpp_type_args(used_as_rvalue_type=True),
         'setter_name': setter_name_for_dictionary_member(member),
     }