Revert of Make non-Module generators only context allocate parameters.

src/debug/debug-scopes.h

Index: src/debug/debug-scopes.h
diff --git a/src/debug/debug-scopes.h b/src/debug/debug-scopes.h
index 6993d201ec702cbc80f4c46751889e87b63ea2e9..d187f3e7bd90fc2ce17ee44a4bad8f4d9a2015e0 100644
--- a/src/debug/debug-scopes.h
+++ b/src/debug/debug-scopes.h
@@ -93,8 +93,7 @@
   };
 
   Isolate* isolate_;
-  FrameInspector* const frame_inspector_ = nullptr;
-  Handle<JSGeneratorObject> generator_;
+  FrameInspector* const frame_inspector_;
   Handle<Context> context_;
   List<ExtendedScopeInfo> nested_scope_chain_;
   Handle<StringSet> non_locals_;
@@ -104,14 +103,9 @@
     return frame_inspector_->GetArgumentsFrame();
   }
 
-  Handle<Context> GetContext();
-  Handle<JSFunction> GetFunction();
-  int GetSourcePosition();
-
-  void MaterializeStackLocals(Handle<JSObject> local_scope,
-                              Handle<ScopeInfo> scope_info);
-
-  void TryParseAndRetrieveScopes(ScopeIterator::Option option);
+  inline Handle<JSFunction> GetFunction() {
+    return frame_inspector_->GetFunction();
+  }
 
   void RetrieveScopeChain(DeclarationScope* scope);
 
@@ -139,7 +133,7 @@
                              Handle<Object> new_value);
 
   // Helper functions.
-  bool SetParameterValue(Handle<ScopeInfo> scope_info,
+  bool SetParameterValue(Handle<ScopeInfo> scope_info, JavaScriptFrame* frame,
                          Handle<String> parameter_name,
                          Handle<Object> new_value);
   bool SetStackVariableValue(Handle<ScopeInfo> scope_info,