Revert of Optimize trivial regexp disjunctions

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 2848 matching lines @@
                              RegExpNode* on_success) override;
   RegExpDisjunction* AsDisjunction() override;
   Interval CaptureRegisters() override;
   bool IsDisjunction() override;
   bool IsAnchoredAtStart() override;
   bool IsAnchoredAtEnd() override;
   int min_match() override { return min_match_; }
   int max_match() override { return max_match_; }
   ZoneList<RegExpTree*>* alternatives() { return alternatives_; }
  private:
-  bool SortConsecutiveAtoms(RegExpCompiler* compiler);
-  void RationalizeConsecutiveAtoms(RegExpCompiler* compiler);
-  void FixSingleCharacterDisjunctions(RegExpCompiler* compiler);
   ZoneList<RegExpTree*>* alternatives_;
   int min_match_;
   int max_match_;
 };
 
 
 class RegExpAlternative final : public RegExpTree {
  public:
   explicit RegExpAlternative(ZoneList<RegExpTree*>* nodes);
   void* Accept(RegExpVisitor* visitor, void* data) override;
@@ skipping 714 matching lines @@
 
  private:
   Zone* zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_