Script-based imports should basically work

sky/engine/core/app/ModuleLoader.cpp

+// 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.
+
+#include "config.h"
+#include "core/app/ModuleLoader.h"
+
+#include "base/bind.h"
+#include "core/app/Application.h"
+#include "core/app/Module.h"
+#include "core/dom/Document.h"
+#include "core/dom/DocumentParser.h"
+#include "core/html/HTMLDocument.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+ModuleLoader::Client::~Client() {
+}
+
+ModuleLoader::ModuleLoader(Client* client,
+                           Application* application,
+                           const KURL& url)
+    : state_(LOADING),
+      client_(client),
+      application_(application),
+      fetcher_(adoptPtr(new MojoFetcher(this, url))),
+      weak_factory_(this) {
+}
+
+ModuleLoader::~ModuleLoader() {
+}
+
+void ModuleLoader::OnReceivedResponse(mojo::URLResponsePtr response) {
+  if (response->error || response->status_code >= 400) {
+    String message =

[eseidel, 2014/11/12 19:23:18]

I think there is a String::format which will take printf semantics. 

[abarth-chromium, 2014/11/12 21:15:53]

Ah, nice!

+        "Failed to load resource: the server responded with a status of " +
+        String::number(response->status_code) +
+        " (" + response->status_line.data() + ')';
+    RefPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(
+        NetworkMessageSource, ErrorMessageLevel, message, response->url.data());
+    application_->document()->addMessage(consoleMessage);
+    state_ = COMPLETE;
+    client_->OnModuleLoadComplete(this, nullptr);
+    return;
+  }
+
+  WeakPtr<Document> context = application_->document()->contextDocument();
+  ASSERT(context.get());
+  KURL url(ParsedURLString, String::fromUTF8(response->url));
+  DocumentInit init = DocumentInit(url, 0, context, 0)
+      .withRegistrationContext(context->registrationContext());
+
+  RefPtr<Document> document = HTMLDocument::create(init);
+  document->startParsing()->parse(response->body.Pass(),
+      base::Bind(&ModuleLoader::OnParsingComplete, weak_factory_.GetWeakPtr()));
+
+  module_ = Module::create(context.get(),
+                           application_,
+                           document.release(),
+                           url.string());
+}
+
+void ModuleLoader::OnParsingComplete() {
+  state_ = COMPLETE;
+  client_->OnModuleLoadComplete(this, module_.get());
+}
+
+} // namespace blink