Fix bitrot in Chrome clang tool infrastructure.

tools/clang/rewrite_scoped_array/RewriteScopedArray.cpp

-// 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.
-//
-// This implements a Clang tool to rewrite all instances of scoped_array<T> to
-// scoped_ptr<T[]>. The former is being deprecated in favor of the latter, to
-// allow for an eventual transition from scoped_ptr to unique_ptr.
-
-#include "clang/AST/ASTContext.h"
-#include "clang/ASTMatchers/ASTMatchers.h"
-#include "clang/ASTMatchers/ASTMatchFinder.h"
-#include "clang/Basic/SourceManager.h"
-#include "clang/Frontend/FrontendActions.h"
-#include "clang/Lex/Lexer.h"
-#include "clang/Tooling/CommonOptionsParser.h"
-#include "clang/Tooling/Refactoring.h"
-#include "clang/Tooling/Tooling.h"
-#include "llvm/Support/CommandLine.h"
-
-using clang::ast_matchers::MatchFinder;
-using clang::ast_matchers::hasDeclaration;
-using clang::ast_matchers::hasName;
-using clang::ast_matchers::id;
-using clang::ast_matchers::loc;
-using clang::ast_matchers::qualType;
-using clang::ast_matchers::recordDecl;
-using clang::tooling::CommonOptionsParser;
-using clang::tooling::Replacement;
-using clang::tooling::Replacements;
-using llvm::StringRef;
-
-namespace {
-
-class RewriterCallback : public MatchFinder::MatchCallback {
- public:
-  RewriterCallback(Replacements* replacements) : replacements_(replacements) {}
-  virtual void run(const MatchFinder::MatchResult& result) LLVM_OVERRIDE;
-
- private:
-  Replacements* const replacements_;
-};
-
-void RewriterCallback::run(const MatchFinder::MatchResult& result) {
-  const clang::TypeLoc type_location =
-      *result.Nodes.getNodeAs<clang::TypeLoc>("loc");
-  clang::CharSourceRange range = clang::CharSourceRange::getTokenRange(
-      result.SourceManager->getSpellingLoc(type_location.getLocStart()),
-      result.SourceManager->getSpellingLoc(type_location.getLocEnd()));
-  // TODO(dcheng): Log an error?
-  if (!range.isValid())
-    return;
-  std::string replacement_text = clang::Lexer::getSourceText(
-      range, *result.SourceManager, result.Context->getLangOpts());
-  // TODO(dcheng): Log errors?
-  if (!StringRef(replacement_text).startswith("scoped_array<") ||
-      !StringRef(replacement_text).endswith(">"))
-    return;
-  replacement_text.replace(strlen("scoped_"), strlen("array"), "ptr");
-  replacement_text.insert(replacement_text.size() - 1, "[]");
-  replacements_->insert(
-      Replacement(*result.SourceManager, range, replacement_text));
-}
-
-}  // namespace
-
-static llvm::cl::extrahelp common_help(CommonOptionsParser::HelpMessage);
-
-int main(int argc, const char* argv[]) {
-  CommonOptionsParser options(argc, argv);
-  clang::tooling::ClangTool tool(options.getCompilations(),
-                                 options.getSourcePathList());
-
-  Replacements replacements;
-  RewriterCallback callback(&replacements);
-  MatchFinder match_finder;
-  match_finder.addMatcher(
-      id("loc",
-         loc(qualType(hasDeclaration(recordDecl(hasName("::scoped_array")))))),
-      &callback);
-
-  int result =
-      tool.run(clang::tooling::newFrontendActionFactory(&match_finder));
-  if (result != 0)
-    return result;
-
-  // Serialization format is documented in tools/clang/scripts/run_tool.py
-  llvm::outs() << "==== BEGIN EDITS ====\n";
-  for (Replacements::const_iterator it = replacements.begin();
-       it != replacements.end(); ++it) {
-    llvm::outs() << "r:" << it->getFilePath() << ":" << it->getOffset() << ":"
-                 << it->getLength() << ":" << it->getReplacementText() << "\n";
-  }
-  llvm::outs() << "==== END EDITS ====\n";
-
-  return 0;
-}