Use auto-rethrowing v8::TryCatch variant

Source/bindings/templates/methods.cpp

 {##############################################################################}
 {% macro generate_method(method, world_suffix) %}
 {% filter conditional(method.conditional_string) %}
 static void {{method.name}}{{method.overload_index}}Method{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     {# Local variables #}
     {% if method.has_exception_state %}
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "{{method.name}}", "{{interface_name}}", info.Holder(), info.GetIsolate());
     {% endif %}
     {# Overloaded methods have length checked during overload resolution #}
@@ skipping 62 matching lines @@
 {% endmacro %}
 
 
 {######################################}
 {% macro generate_arguments(method, world_suffix) %}
 {% for argument in method.arguments %}
 {{generate_argument_var_declaration(argument)}};
 {% endfor %}
 {
     {% if method.arguments_need_try_catch %}
-    v8::TryCatch block;
+    V8TryPropagate block;
     {% endif %}
     {% for argument in method.arguments %}
     {{generate_argument(method, argument, world_suffix) | indent}}
     {% endfor %}
 }
 {% endmacro %}
 
 
 {######################################}
 {% macro generate_argument_var_declaration(argument) %}
@@ skipping 194 matching lines @@
 {######################################}
 {% macro throw_type_error(method, error_message) %}
 {% if method.has_exception_state %}
 exceptionState.throwTypeError({{error_message}});
 {{throw_from_exception_state(method)}};
 {% elif method.is_constructor %}
 throwTypeError(ExceptionMessages::failedToConstruct("{{interface_name}}", {{error_message}}), info.GetIsolate());
 {% else %}{# method.has_exception_state #}
 throwTypeError(ExceptionMessages::failedToExecute("{{method.name}}", "{{interface_name}}", {{error_message}}), info.GetIsolate());
 {% endif %}
-{% if method.arguments_need_try_catch %}
-block.ReThrow();
-{%- endif %}{# method.has_exception_state #}
 {% endmacro %}
 
 
 {######################################}
 {# FIXME: return a rejected Promise if method.idl_type == 'Promise' #}
 {% macro throw_from_exception_state(method) %}
 exceptionState.throwIfNeeded()
 {%- endmacro %}
 
 
@@ skipping 244 matching lines @@
     {% endif %}
     {{constructor.cpp_type}} impl = {{cpp_class}}::createForJSConstructor({{constructor.argument_list | join(', ')}});
     {% if is_constructor_raises_exception %}
     if (exceptionState.throwIfNeeded())
         return;
     {% endif %}
 
     {{generate_constructor_wrapper(constructor) | indent}}
 }
 {% endmacro %}