sync: Remove unused path_helpers.h file.

chrome/browser/sync/util/path_helpers.h

-// Copyright (c) 2009 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 CHROME_BROWSER_SYNC_UTIL_PATH_HELPERS_H_
-#define CHROME_BROWSER_SYNC_UTIL_PATH_HELPERS_H_
-
-#include <algorithm>
-#include <iterator>
-#include <string>
-
-#include "base/file_path.h"
-#include "chrome/browser/sync/util/sync_types.h"
-
-extern const char kPathSeparator[];
-
-template <typename StringType>
-class PathSegmentIterator : public std::iterator<std::forward_iterator_tag,
-                                                 StringType> {
- public:
-  explicit PathSegmentIterator(const StringType& path) :
-  path_(path), segment_begin_(0), segment_end_(0) {
-    ++(*this);
-  }
-
-  PathSegmentIterator() : segment_begin_(0), segment_end_(0) { }
-
-  // Default copy constructors, constructors, etc. will all do the right thing.
-  PathSegmentIterator& operator ++() {
-    segment_begin_ =
-        std::min(path_.size(),
-                 path_.find_first_not_of(kPathSeparator, segment_end_));
-    segment_end_ =
-        std::min(path_.size(),
-                 path_.find_first_of(kPathSeparator, segment_begin_));
-    value_.assign(path_, segment_begin_, segment_end_ - segment_begin_);
-    return *this;
-  }
-
-  PathSegmentIterator operator ++(int) {
-    PathSegmentIterator i(*this);
-    return ++i;
-  }
-
-  const StringType& operator * () const {
-    return value_;
-  }
-  const StringType* operator -> () const {
-    return &value_;
-  }
-
-  // If the current value and remaining path are equal, then we
-  // call the iterators equal.
-  bool operator == (const PathSegmentIterator& i) const {
-    return 0 == path_.compare(segment_begin_,
-      path_.size() - segment_begin_,
-      i.path_, i.segment_begin_, i.path_.size() - i.segment_begin_);
-  }
-
-  bool operator != (const PathSegmentIterator& i) const {
-    return !(*this == i);
-  }
-
- protected:
-  StringType path_;
-  typename StringType::size_type segment_begin_;
-  typename StringType::size_type segment_end_;
-  StringType value_;
-};
-
-// Makes a path component legal for your OS, but doesn't handle collisions
-// with other files in the same directory. it can do this by removing
-// illegal characters and adding ~1 before the first '.' in the filename.
-// returns PSTR("") if the name is fine as-is
-// on mac/linux we let names stay unicode normalization form C in the system
-// and convert to another normal form in fuse handlers. but, if a '/' is in
-// a filename, we handle it here.
-std::string MakePathComponentOSLegal(const std::string& component);
-
-#endif  // CHROME_BROWSER_SYNC_UTIL_PATH_HELPERS_H_