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

Source/bindings/templates/attributes.cpp

 {##############################################################################}
 {% macro attribute_getter(attribute, world_suffix) %}
 {% filter conditional(attribute.conditional_string) %}
 static void {{attribute.name}}AttributeGetter{{world_suffix}}(
 {%- if attribute.is_expose_js_accessors %}
 const v8::FunctionCallbackInfo<v8::Value>& info
 {%- else %}
 const v8::PropertyCallbackInfo<v8::Value>& info
 {%- endif %})
 {
@@ skipping 223 matching lines @@
         return;
     {% endif %}
     {# Convert JS value to C++ value #}
     {% if attribute.idl_type != 'EventHandler' %}
     {{attribute.v8_value_to_local_cpp_value}};
     {% elif not is_node %}{# EventHandler hack #}
     moveEventListenerToNewWrapper(info.GetIsolate(), holder, {{attribute.event_handler_getter_expression}}, v8Value, {{v8_class}}::eventListenerCacheIndex);
     {% endif %}
     {# Type checking, possibly throw a TypeError, per:
        http://www.w3.org/TR/WebIDL/#es-type-mapping #}
-    {% if attribute.has_type_checking_unrestricted %}
-    {# Non-finite floating point values (NaN, +Infinity or −Infinity), per:
-       http://heycam.github.io/webidl/#es-float
-       http://heycam.github.io/webidl/#es-double #}
-    if (!std::isfinite(cppValue)) {
-        exceptionState.throwTypeError("The provided {{attribute.idl_type}} value is non-finite.");
-        exceptionState.throwIfNeeded();
-        return;
-    }
-    {% elif attribute.has_type_checking_interface %}
+    {% if attribute.has_type_checking_interface %}
     {# Type checking for interface types (if interface not implemented, throw
        TypeError), per http://www.w3.org/TR/WebIDL/#es-interface #}
     if (!cppValue{% if attribute.is_nullable %} && !isUndefinedOrNull(v8Value){% endif %}) {
         exceptionState.throwTypeError("The provided value is not of type '{{attribute.idl_type}}'.");
         exceptionState.throwIfNeeded();
         return;
     }
     {% elif attribute.enum_validation_expression %}
     {# Setter ignores invalid enum values:
        http://www.w3.org/TR/WebIDL/#idl-enums #}
@@ skipping 168 matching lines @@
        access_control,
        property_attribute,
        only_exposed_to_private_script,
    ] %}
 {% if not attribute.is_expose_js_accessors %}
 {% set attribute_configuration_list = attribute_configuration_list
                                     + [on_prototype] %}
 {% endif %}
 {{'{'}}{{attribute_configuration_list | join(', ')}}{{'}'}}
 {%- endmacro %}