Add the c++ code part of bindings2/

sky/engine/bindings2/scripts/templates/methods_cpp.template

 {##############################################################################}
 {# FIXME: We should return a rejected Promise if an error occurs in this
 function when ALL methods in this overload return Promise. In order to do so,
 we must ensure either ALL or NO methods in this overload return Promise #}
 {% macro overload_resolution_method(method) %}
 {% set overloads = method.overloads %}
 {% if method.is_static %}
   {% set offset = 0 %}
 {% else %}
   {% set offset = 1 %}
@@ skipping 76 matching lines @@
       method.has_exception_state or
       method.is_call_with_script_state or
       method.is_call_with_execution_context or
       method.is_call_with_script_arguments %}
     Dart_Handle exception = nullptr;
 {% endif %}
     {
         {% if method.is_call_with_script_state %}
         ScriptState* state = DartUtilities::currentScriptState();
         if (!state) {
-            exception = Dart_NewStringFromCString("Failed to retrieve a script state");
+            exception = ToDart("Failed to retrieve a script state");
             goto fail;
         }
         {% endif %}
         {% if method.is_call_with_execution_context %}
         ExecutionContext* context = DOMDartState::CurrentDocument();
         if (!context) {
-            exception = Dart_NewStringFromCString("Failed to retrieve a context");
+            exception = ToDart("Failed to retrieve a context");
             goto fail;
         }
         {% endif %}
         {% if method.is_call_with_script_arguments %}
         {# Last parameter is the customArgument #}
         Dart_Handle customArgument = Dart_GetNativeArgument(args, Dart_GetNativeArgumentCount(args) - 1);
         RefPtr<ScriptArguments> scriptArguments(DartUtilities::createScriptArguments(customArgument, exception));
         if (!scriptArguments)
             goto fail;
         {% endif %}
@@ skipping 196 matching lines @@
       constructor.has_exception_state or
       is_constructor_call_with_execution_context or
       is_constructor_call_with_document or
       (constructor == named_constructor) %}
     Dart_Handle exception = nullptr;
 {% endif %}
     {
 {% if is_constructor_call_with_execution_context %}
         ExecutionContext* context = DOMDartState::CurrentDocument();
         if (!context) {
-            exception = Dart_NewStringFromCString("Failed to retrieve a context");
+            exception = ToDart("Failed to retrieve a context");
             goto fail;
         }
 {% endif %}
 {% if is_constructor_call_with_document or (constructor == named_constructor) %}
         LocalDOMWindow* domWindow = DOMDartState::CurrentWindow();
         if (!domWindow) {
-            exception = Dart_NewStringFromCString("Failed to fetch domWindow");
+            exception = ToDart("Failed to fetch domWindow");
             goto fail;
         }
         Document& document = *domWindow->document();
 {% endif %}
         int argCount /* FIXME(vsm): Remove this. */ ALLOW_UNUSED = Dart_GetNativeArgumentCount(args);
 {% if constructor.has_exception_state %}
         ExceptionState es;
 {% endif %}
         {{generate_arguments(constructor) | indent(8)}}
         {{callback_return(constructor, constructor.dart_set_return_value, constructor.cpp_value) | indent(8)}}
@@ skipping 58 matching lines @@
 
 {##############################################################################}
 {% macro generate_symbolizer_constructor(dart_class, class_name, constructor) %}
 {% for native_entry in constructor.native_entries %}
 {% set resolver_string = native_entry.resolver_string %}
 if (native_function == {{dart_class}}Internal::{{static_method_name(constructor.name, constructor.overload_index)}}) {
   return reinterpret_cast<const uint8_t*>("{{resolver_string}}");
 }
 {% endfor %}
 {% endmacro %}