[modules] Add partial support for debug-scopes.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c6434e01c6cdb89f4191a8166cbcc8864133cdbf..ef3f31df4793aefb3cdfbc7012a9c889589b8fb7 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4686,6 +4686,14 @@ class ScopeInfo : public FixedArray {
              VariableLocation* location, InitializationFlag* init_flag,
              MaybeAssignedFlag* maybe_assigned_flag);
 
+  // Get metadata of i-th MODULE-allocated variable, where 0 <= i <
+  // ModuleVariableCount.  The metadata is returned via out-arguments, which may
+  // be nullptr if the corresponding information is not requested
+  void ModuleVariable(int i, String** name, int* index,
+                      VariableMode* mode = nullptr,
+                      InitializationFlag* init_flag = nullptr,
+                      MaybeAssignedFlag* maybe_assigned_flag = nullptr);
+
   // Used for the function name variable for named function expressions, and for
   // the receiver.
   enum VariableAllocationInfo { NONE, STACK, CONTEXT, UNUSED };
@@ -4753,14 +4761,19 @@ class ModuleInfoEntry : public FixedArray {
 class ModuleInfo : public FixedArray {
  public:
   DECLARE_CAST(ModuleInfo)
+
   static Handle<ModuleInfo> New(Isolate* isolate, Zone* zone,
                                 ModuleDescriptor* descr);
+
   inline FixedArray* module_requests() const;
   inline FixedArray* special_exports() const;
   inline FixedArray* regular_exports() const;
   inline FixedArray* namespace_imports() const;
   inline FixedArray* regular_imports() const;
 
+  static Handle<ModuleInfoEntry> LookupRegularImport(Handle<ModuleInfo> info,
+                                                     Handle<String> local_name);
+
 #ifdef DEBUG
   inline bool Equals(ModuleInfo* other) const;
 #endif