[modules] Introduce v8::Module to the API and return it from CompileModule

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
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   /**
    * Returns zero based line number of the code_pos location in the script.
    * -1 will be returned if no information available.
    */
   int GetLineNumber(int code_pos);
 
   static const int kNoScriptId = 0;
 };
 
+/**
+ * This is an unfinished experimental feature, and is only exposed
+ * here for internal testing purposes. DO NOT USE.
+ *
+ * A compiled JavaScript module.
+ */
+class V8_EXPORT Module {
+ public:
+  /**
+   * ModuleDeclarationInstantiation
+   */
+  V8_WARN_UNUSED_RESULT Maybe<bool> Instantiate(Local<Context> context);
+
+  /**
+   * ModuleEvaluation
+   */
+  V8_WARN_UNUSED_RESULT MaybeLocal<Value> Evaluate(Local<Context> context);
+};
 
 /**
  * A compiled JavaScript script, tied to a Context which was active when the
  * script was compiled.
  */
 class V8_EXPORT Script {
  public:
   /**
    * A shorthand for ScriptCompiler::Compile().
    */
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    *
    *   The easiest way to do so is to clear the embedder's cache on any
    *   such change.
    *
    *   Alternatively, this tag can be stored alongside the cached data and
    *   compared when it is being used.
    */
   static uint32_t CachedDataVersionTag();
 
   /**
-   * Compile an ES6 module.
+   * This is an unfinished experimental feature, and is only exposed
+   * here for internal testing purposes. DO NOT USE.
    *
-   * This is an unfinished experimental feature, and is only exposed
-   * here for internal testing purposes.
-   * Only parsing works at the moment. Do not use.
+   * Compile an ES module, returning a Module that encapsulates
+   * the compiled code.
    *
-   * TODO(adamk): Script is likely the wrong return value for this;
-   * should return some new Module type.
+   * Corresponds to the ParseModule abstract operation in the
+   * ECMAScript specification.
    */
-  static V8_WARN_UNUSED_RESULT MaybeLocal<Script> CompileModule(
-      Local<Context> context, Source* source,
-      CompileOptions options = kNoCompileOptions);
+  static V8_WARN_UNUSED_RESULT MaybeLocal<Module> CompileModule(
+      Isolate* isolate, Source* source);
 
   /**
    * Compile a function for a given context. This is equivalent to running
    *
    * with (obj) {
    *   return function(args) { ... }
    * }
    *
    * It is possible to specify multiple context extensions (obj in the above
    * example).
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  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_