Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/operators.h

-// Copyright (c) 2013 The Chromium 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 TOOLS_GN_OPERATORS_H_
-#define TOOLS_GN_OPERATORS_H_
-
-class BinaryOpNode;
-class Err;
-class ParseNode;
-class Scope;
-class Token;
-class UnaryOpNode;
-class Value;
-
-bool IsUnaryOperator(const Token& token);
-bool IsBinaryOperator(const Token& token);
-
-bool IsFunctionCallArgBeginScoper(const Token& token);  // "("
-bool IsFunctionCallArgEndScoper(const Token& token);  // ")"
-
-bool IsScopeBeginScoper(const Token& token);  // "{"
-bool IsScopeEndScoper(const Token& token);  // "}"
-
-Value ExecuteUnaryOperator(Scope* scope,
-                           const UnaryOpNode* op_node,
-                           const Value& value,
-                           Err* err);
-Value ExecuteBinaryOperator(Scope* scope,
-                            const BinaryOpNode* op_node,
-                            const ParseNode* left,
-                            const ParseNode* right,
-                            Err* err);
-
-#endif  // TOOLS_GN_OPERATORS_H_