Find right scope associated with prologue

src/scopes.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.
 
 #ifndef V8_SCOPES_H_
 #define V8_SCOPES_H_
 
 #include "src/ast.h"
 #include "src/pending-compilation-error-handler.h"
 #include "src/zone.h"
@@ skipping 466 matching lines @@
 
   // The number of contexts between this and scope; zero if this == scope.
   int ContextChainLength(Scope* scope);
 
   // Find the first function, script, eval or (declaration) block scope. This is
   // the scope where var declarations will be hoisted to in the implementation.
   Scope* DeclarationScope();
 
   // Find the first non-block declaration scope. This should be either a script,
   // function, or eval scope. Same as DeclarationScope(), but skips
-  // declaration "block" scopes. Used for declaring temporaries.
-  Scope* TemporaryScope();
+  // declaration "block" scopes. Used for differentiating associated
+  // function objects (i.e., the scope for which a function prologue allocates
+  // a context) or declaring temporaries.
+  Scope* ClosureScope();
 
   // Find the first (non-arrow) function or script scope.  This is where
   // 'this' is bound, and what determines the function kind.
   Scope* ReceiverScope();
 
   Handle<ScopeInfo> GetScopeInfo(Isolate* isolate);
 
   // Get the chain of nested scopes within this scope for the source statement
   // position. The scopes will be added to the list from the outermost scope to
   // the innermost scope. Only nested block, catch or with scopes are tracked
@@ skipping 266 matching lines @@
   PendingCompilationErrorHandler pending_error_handler_;
 
   // For tracking which classes are declared consecutively. Needed for strong
   // mode.
   int class_declaration_group_start_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPES_H_