Have bindings layer assume and insist that all interface types are GCed.

third_party/WebKit/Source/bindings/templates/methods.cpp

 {% from 'utilities.cpp' import declare_enum_validation_variable, v8_value_to_local_cpp_value, check_origin_trial %}
 
 {##############################################################################}
 {% macro generate_method(method, world_suffix) %}
 {% if method.returns_promise and method.has_exception_state %}
 static void {{method.name}}{{method.overload_index}}Method{{world_suffix}}Promise(const v8::FunctionCallbackInfo<v8::Value>& info, ExceptionState& exceptionState)
 {% else %}
 static void {{method.name}}{{method.overload_index}}Method{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {% endif %}
 {
@@ skipping 233 matching lines @@
 {# [CallWith=ScriptState] #}
 ScriptState* scriptState = ScriptState::current(info.GetIsolate());
 {% endif %}
 {% if method.is_call_with_execution_context %}
 {# [ConstructorCallWith=ExecutionContext] #}
 {# [CallWith=ExecutionContext] #}
 ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
 {% endif %}
 {% if method.is_call_with_script_arguments %}
 {# [CallWith=ScriptArguments] #}
-RawPtr<ScriptArguments> scriptArguments(ScriptArguments::create(scriptState, info, {{method.number_of_arguments}}));
+ScriptArguments* scriptArguments(ScriptArguments::create(scriptState, info, {{method.number_of_arguments}}));
 {% endif %}
 {% if method.is_call_with_document %}
 {# [ConstructorCallWith=Document] #}
 Document& document = *toDocument(currentExecutionContext(info.GetIsolate()));
 {% endif %}
 {# Call #}
 {% if method.idl_type == 'void' %}
 {{cpp_value}};
 {% elif method.is_implemented_in_private_script %}
 {{method.cpp_type}} result{{method.cpp_type_initializer}};
@@ skipping 203 matching lines @@
 {##############################################################################}
 {% macro generate_post_message_impl() %}
 void postMessageImpl(const char* interfaceName, {{cpp_class}}* instance, const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "postMessage", interfaceName, info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         setMinimumArityTypeError(exceptionState, 1, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
-    RawPtr<MessagePortArray> ports = new MessagePortArray;
+    MessagePortArray* ports = new MessagePortArray;
     ArrayBufferArray arrayBuffers;
     ImageBitmapArray imageBitmaps;
     if (info.Length() > 1) {
         const int transferablesArgIndex = 1;
         if (!SerializedScriptValue::extractTransferables(info.GetIsolate(), info[transferablesArgIndex], transferablesArgIndex, *ports, arrayBuffers, imageBitmaps, exceptionState)) {
             exceptionState.throwIfNeeded();
             return;
         }
     }
-    RefPtr<SerializedScriptValue> message = SerializedScriptValueFactory::instance().create(info.GetIsolate(), info[0], ports.get(), &arrayBuffers, &imageBitmaps, exceptionState);
+    RefPtr<SerializedScriptValue> message = SerializedScriptValueFactory::instance().create(info.GetIsolate(), info[0], ports, &arrayBuffers, &imageBitmaps, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     // FIXME: Only pass context/exceptionState if instance really requires it.
     ExecutionContext* context = currentExecutionContext(info.GetIsolate());
-    instance->postMessage(context, message.release(), ports.get(), exceptionState);
+    instance->postMessage(context, message.release(), ports, exceptionState);
     exceptionState.throwIfNeeded();
 }
 {% endmacro %}
 
 {##############################################################################}
 {% macro method_callback(method, world_suffix) %}
 static void {{method.name}}MethodCallback{{world_suffix}}(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     {% if not method.overloads %}{# Overloaded methods are measured in overload_resolution_method() #}
     {% if method.measure_as %}
@@ skipping 194 matching lines @@
 {% filter runtime_enabled(method.overloads.runtime_enabled_function_all
                           if method.overloads else
                           method.runtime_enabled_function) %}
 const V8DOMConfiguration::MethodConfiguration {{method.name}}MethodConfiguration = {{method_configuration(method)}};
 V8DOMConfiguration::installMethod(isolate, v8::Local<v8::Object>(), prototypeObject, interfaceObject, signature, {{method.name}}MethodConfiguration);
 {% endfilter %}{# runtime_enabled() #}
 {% endfilter %}{# exposed() #}
 {% endfor %}
 {% endif %}
 {%- endmacro %}