Add basic compilation support for modules

test/cctest/cctest.h

Index: test/cctest/cctest.h
diff --git a/test/cctest/cctest.h b/test/cctest/cctest.h
index 1d70c0e8aea4dcb773381c30eb89a012099d4fd0..e111438cdf7de109e3834dfeba6a41a1fa9a1e9c 100644
--- a/test/cctest/cctest.h
+++ b/test/cctest/cctest.h
@@ -389,6 +389,14 @@ static inline v8::Local<v8::Value> CompileRun(const char* source) {
 }
 
 
+// Compiles source as an ES6 module.
+static inline v8::Local<v8::Value> CompileRunModule(const char* source) {
+  v8::ScriptCompiler::Source script_source(v8_str(source));
+  return v8::ScriptCompiler::CompileModule(v8::Isolate::GetCurrent(),
+                                           &script_source)->Run();
+}
+
+
 static inline v8::Local<v8::Value> CompileRun(v8::Local<v8::String> source) {
   return v8::Script::Compile(source)->Run();
 }