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

trunk/src/tools/gn/string_utils.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_STRING_UTILS_H_
-#define TOOLS_GN_STRING_UTILS_H_
-
-#include "base/strings/string_piece.h"
-
-class Err;
-class Scope;
-class Token;
-class Value;
-
-inline std::string operator+(const std::string& a, const base::StringPiece& b) {
-  std::string ret;
-  ret.reserve(a.size() + b.size());
-  ret.assign(a);
-  ret.append(b.data(), b.size());
-  return ret;
-}
-
-inline std::string operator+(const base::StringPiece& a, const std::string& b) {
-  std::string ret;
-  ret.reserve(a.size() + b.size());
-  ret.assign(a.data(), a.size());
-  ret.append(b);
-  return ret;
-}
-
-// Unescapes and expands variables in the given literal, writing the result
-// to the given value. On error, sets |err| and returns false.
-bool ExpandStringLiteral(Scope* scope,
-                         const Token& literal,
-                         Value* result,
-                         Err* err);
-
-// Removes the given prefix from the string. Asserts if the string does
-// not have the given prefix.
-//
-// Note: could potentially return a StringPiece into the str.
-std::string RemovePrefix(const std::string& str, const std::string& prefix);
-
-// Appends the given string piece to the given string. This avoids an
-// intermediate copy.
-inline void AppendStringPiece(std::string* dest,
-                              const base::StringPiece& piece) {
-  dest->append(piece.data(), piece.size());
-}
-
-#endif  // TOOLS_GN_STRING_UTILS_H_