Print function scopes with indents.

runtime/vm/ast_printer.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_AST_PRINTER_H_
 #define VM_AST_PRINTER_H_
 
 #include "vm/ast.h"
 #include "vm/growable_array.h"
 
@@ skipping 11 matching lines @@
 #define DECLARE_VISITOR_FUNCTION(BaseName)                                     \
   virtual void Visit##BaseName##Node(BaseName##Node* node);
 
   FOR_EACH_NODE(DECLARE_VISITOR_FUNCTION)
 #undef DECLARE_VISITOR_FUNCTION
 
  private:
   AstPrinter();
   ~AstPrinter();
 
+  static const int kScopeIndent = 2;
+
   static void PrintLocalScopeVariable(const LocalScope* scope,
-                                      LocalVariable* var);
-  static void PrintLocalScope(const LocalScope* scope, int variable_index);
+                                      LocalVariable* var,
+                                      int indent = 0);
+  static void PrintLocalScope(const LocalScope* scope,
+                              int variable_index,
+                              int indent = 0);
 
   void VisitGenericAstNode(AstNode* node);
   void VisitGenericLocalNode(AstNode* node, const LocalVariable& local);
   void VisitGenericFieldNode(AstNode* node, const Field& field);
 
   DISALLOW_COPY_AND_ASSIGN(AstPrinter);
 };
 
 }  // namespace dart
 
 #endif  // VM_AST_PRINTER_H_