rewrite_to_chrome_style: associate replacements with the affected file

tools/clang/rewrite_to_chrome_style/EditTracker.h

+// Copyright 2016 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_CLANG_REWRITE_TO_CHROME_STYLE_EDIT_TRACKER_H_
+#define TOOLS_CLANG_REWRITE_TO_CHROME_STYLE_EDIT_TRACKER_H_
+
+#include <map>
+
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+
+namespace llvm {
+class raw_ostream;
+}  // namespace llvm
+
+struct EditInfo {
+  std::string new_text;
+  llvm::StringSet<> filenames;
+};
+
+// Simple class that tracks the edits made by path. Used to dump the databaes

[danakj, 2016/12/22 21:06:40]

the databaes are bae

+// used by the Blink rebase helper.
+class EditTracker {
+ public:
+  EditTracker() = default;
+
+  void Add(const clang::SourceManager& source_manager,
+           clang::SourceLocation location,
+           llvm::StringRef original_text,
+           llvm::StringRef new_text);
+
+  // Serializes the tracked edits to |output|. Emits:
+  // <filename>:<tag>:<original text>:<new text>
+  // for each distinct filename for each tracked edit.
+  void SerializeTo(llvm::StringRef tag, llvm::raw_ostream& output) const;
+
+ private:
+  EditTracker(const EditTracker&) = delete;
+  EditTracker& operator=(const EditTracker&) = delete;
+
+  // The string key is the original text.
+  llvm::StringMap<EditInfo> tracked_edits_;
+};
+
+#endif  // #define TOOLS_CLANG_REWRITE_TO_CHROME_STYLE_EDIT_TRACKER_H_