Script-based imports should basically work

sky/engine/core/app/AbstractModule.cpp

Index: sky/engine/core/app/AbstractModule.cpp
diff --git a/sky/engine/core/app/AbstractModule.cpp b/sky/engine/core/app/AbstractModule.cpp
index 5595d37ba8d799cedacda1df4672aad475dd46b3..3bffdf2f6601112c3d61002f0e3c882adad4ae11 100644
--- a/sky/engine/core/app/AbstractModule.cpp
+++ b/sky/engine/core/app/AbstractModule.cpp
@@ -5,6 +5,8 @@
 #include "config.h"
 #include "core/app/AbstractModule.h"
 
+#include "core/app/Module.h"
+
 namespace blink {
 
 AbstractModule::AbstractModule(ExecutionContext* context,
@@ -24,4 +26,22 @@ ExecutionContext* AbstractModule::executionContext() const {
   return ContextLifecycleObserver::executionContext();
 }
 
+ScriptPromise AbstractModule::import(ScriptState* script_state,
+                                     const String& url_string) {
+  KURL url = document()->completeURL(url_string);
+  RefPtr<ScriptPromiseResolver> resolver =
+      ScriptPromiseResolver::create(script_state);
+  OwnPtr<ModuleLoader> loader =
+      adoptPtr(new ModuleLoader(this, GetApplication(), url));
+  loaders_.set(loader.release(), resolver);
+  return resolver->promise();
+}
+
+void AbstractModule::OnModuleLoadComplete(ModuleLoader* loader,
+                                          Module* module) {
+  RefPtr<ScriptPromiseResolver> resolver = loaders_.take(loader);
+  ScriptState::Scope scope(resolver->scriptState());
+  resolver->resolve(module->exports().v8Value());
+}
+
 } // namespace blink