[module] Track script "module code" status

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index a7aabe23e0f856b18734e09f3fe4f40c7b4b508d..1d81c8452c08de860451339f04eb834e4d90d8a0 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6456,6 +6456,11 @@ class Script: public Struct {
   inline v8::ScriptOriginOptions origin_options();
   inline void set_origin_options(ScriptOriginOptions origin_options);
 
+  // [is_module]: determines whether the script is an ES2015 module. Encoded in
+  // the 'flags' field.
+  inline bool is_module();
+  inline void set_is_module(bool value);
+
   DECLARE_CAST(Script)
 
   // If script source is an external string, check that the underlying
@@ -6553,6 +6558,7 @@ class Script: public Struct {
   static const int kOriginOptionsSize = 3;
   static const int kOriginOptionsMask = ((1 << kOriginOptionsSize) - 1)
                                         << kOriginOptionsShift;
+  static const int kIsModuleBit = kOriginOptionsShift + kOriginOptionsSize;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Script);
 };
@@ -8105,16 +8111,18 @@ class CompilationCacheTable: public HashTable<CompilationCacheTable,
                                               HashTableKey*> {
  public:
   // Find cached value for a string key, otherwise return null.
-  Handle<Object> Lookup(
-      Handle<String> src, Handle<Context> context, LanguageMode language_mode);
+  Handle<Object> Lookup(Handle<String> src, Handle<Context> context,
+                        LanguageMode language_mode, bool is_module);
   Handle<Object> LookupEval(
       Handle<String> src, Handle<SharedFunctionInfo> shared,
       LanguageMode language_mode, int scope_position);
   Handle<Object> LookupRegExp(Handle<String> source, JSRegExp::Flags flags);
-  static Handle<CompilationCacheTable> Put(
-      Handle<CompilationCacheTable> cache, Handle<String> src,
-      Handle<Context> context, LanguageMode language_mode,
-      Handle<Object> value);
+  static Handle<CompilationCacheTable> Put(Handle<CompilationCacheTable> cache,
+                                           Handle<String> src,
+                                           Handle<Context> context,
+                                           LanguageMode language_mode,
+                                           bool is_module,
+                                           Handle<Object> value);
   static Handle<CompilationCacheTable> PutEval(
       Handle<CompilationCacheTable> cache, Handle<String> src,
       Handle<SharedFunctionInfo> context, Handle<SharedFunctionInfo> value,