Remove unique static RegExpEmpty instance.

src/ast.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_AST_H_
 #define V8_AST_H_
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
@@ skipping 3099 matching lines @@
 class RegExpEmpty FINAL : public RegExpTree {
  public:
   RegExpEmpty() { }
   virtual void* Accept(RegExpVisitor* visitor, void* data) OVERRIDE;
   virtual RegExpNode* ToNode(RegExpCompiler* compiler,
                              RegExpNode* on_success) OVERRIDE;
   virtual RegExpEmpty* AsEmpty() OVERRIDE;
   virtual bool IsEmpty() OVERRIDE;
   virtual int min_match() OVERRIDE { return 0; }
   virtual int max_match() OVERRIDE { return 0; }
-  static RegExpEmpty* GetInstance() {
-    static RegExpEmpty* instance = ::new RegExpEmpty();
-    return instance;
-  }
 };
 
 
 // ----------------------------------------------------------------------------
 // Out-of-line inline constructors (to side-step cyclic dependencies).
 
 inline ModuleVariable::ModuleVariable(Zone* zone, VariableProxy* proxy, int pos)
     : Module(zone, proxy->interface(), pos),
       proxy_(proxy) {
 }
@@ skipping 576 matching lines @@
  private:
   Zone* zone_;
   Visitor visitor_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_