Removed most of path utility functions in Files app.

chrome/browser/resources/file_manager/common/js/path_util.js

Index: chrome/browser/resources/file_manager/common/js/path_util.js
diff --git a/chrome/browser/resources/file_manager/common/js/path_util.js b/chrome/browser/resources/file_manager/common/js/path_util.js
index 844b7b6a06f059868c32a4a1f994698815584243..f4bc8127ea9fd33b6dbdbeef394ea3189f138cc4 100644
--- a/chrome/browser/resources/file_manager/common/js/path_util.js
+++ b/chrome/browser/resources/file_manager/common/js/path_util.js
@@ -39,220 +39,9 @@ var RootType = Object.freeze({
   DRIVE_RECENT: 'drive_recent'
 });
 
-/**
- * Top directory for each root type.
- * TODO(mtomasz): Deprecated. Remove this.
- * @enum {string}
- * @const
- */
-var RootDirectory = Object.freeze({
-  DOWNLOADS: '/Downloads',
-  ARCHIVE: '/archive',
-  REMOVABLE: '/removable',
-  DRIVE: '/drive',
-  CLOUD_DEVICE: '/privet',
-  DRIVE_OFFLINE: '/drive_offline',  // A fake root. Not the actual filesystem.
-  DRIVE_SHARED_WITH_ME: '/drive_shared_with_me',  // A fake root.
-  DRIVE_RECENT: '/drive_recent'  // A fake root.
-});
-
 var PathUtil = {};
 
 /**
- * Checks if the given path represents a special search. Fake entries in
- * RootDirectory correspond to special searches.
- * @param {string} path Path to check.
- * @return {boolean} True if the given path represents a special search.
- */
-PathUtil.isSpecialSearchRoot = function(path) {
-  var type = PathUtil.getRootType(path);
-  return type == RootType.DRIVE_OFFLINE ||
-      type == RootType.DRIVE_SHARED_WITH_ME ||
-      type == RootType.DRIVE_RECENT;
-};
-
-/**
- * Checks |path| and return true if it is under Google Drive or a special
- * search root which represents a special search from Google Drive.
- * @param {string} path Path to check.
- * @return {boolean} True if the given path represents a Drive based path.
- */
-PathUtil.isDriveBasedPath = function(path) {
-  var rootType = PathUtil.getRootType(path);
-  return rootType === RootType.DRIVE ||
-      rootType === RootType.DRIVE_SHARED_WITH_ME ||
-      rootType === RootType.DRIVE_RECENT ||
-      rootType === RootType.DRIVE_OFFLINE;
-};
-
-/**
- * @param {string} path Path starting with '/'.
- * @return {string} Top directory (starting with '/').
- */
-PathUtil.getTopDirectory = function(path) {
-  var i = path.indexOf('/', 1);
-  return i === -1 ? path : path.substring(0, i);
-};
-
-/**
- * Obtains the parent path of the specified path.
- * @param {string} path Path string.
- * @return {string} Parent path.
- */
-PathUtil.getParentDirectory = function(path) {
-  if (path[path.length - 1] == '/')
-    return PathUtil.getParentDirectory(path.substring(0, path.length - 1));
-  var index = path.lastIndexOf('/');
-  if (index == 0)
-    return '/';
-  else if (index == -1)
-    return '.';
-  return path.substring(0, index);
-};
-
-/**
- * @param {string} path Any unix-style path (may start or not start from root).
- * @return {Array.<string>} Path components.
- */
-PathUtil.split = function(path) {
-  var fromRoot = false;
-  if (path[0] === '/') {
-    fromRoot = true;
-    path = path.substring(1);
-  }
-
-  var components = path.split('/');
-  if (fromRoot)
-    components[0] = '/' + components[0];
-  return components;
-};
-
-/**
- * Returns a directory part of the given |path|. In other words, the path
- * without its base name.
- *
- * Examples:
- * PathUtil.dirname('abc') -> ''
- * PathUtil.dirname('a/b') -> 'a'
- * PathUtil.dirname('a/b/') -> 'a/b'
- * PathUtil.dirname('a/b/c') -> 'a/b'
- * PathUtil.dirname('/') -> '/'
- * PathUtil.dirname('/abc') -> '/'
- * PathUtil.dirname('/abc/def') -> '/abc'
- * PathUtil.dirname('') -> ''
- *
- * @param {string} path The path to be parsed.
- * @return {string} The directory path.
- */
-PathUtil.dirname = function(path) {
-  var index = path.lastIndexOf('/');
-  if (index < 0)
-    return '';
-  if (index == 0)
-    return '/';
-  return path.substring(0, index);
-};
-
-/**
- * Returns the base name (the last component) of the given |path|. If the
- * |path| ends with '/', returns an empty component.
- *
- * Examples:
- * PathUtil.basename('abc') -> 'abc'
- * PathUtil.basename('a/b') -> 'b'
- * PathUtil.basename('a/b/') -> ''
- * PathUtil.basename('a/b/c') -> 'c'
- * PathUtil.basename('/') -> ''
- * PathUtil.basename('/abc') -> 'abc'
- * PathUtil.basename('/abc/def') -> 'def'
- * PathUtil.basename('') -> ''
- *
- * @param {string} path The path to be parsed.
- * @return {string} The base name.
- */
-PathUtil.basename = function(path) {
-  var index = path.lastIndexOf('/');
-  return index >= 0 ? path.substring(index + 1) : path;
-};
-
-/**
- * Join path components into a single path. Can be called either with a list of
- * components as arguments, or with an array of components as the only argument.
- *
- * Examples:
- * Path.join('abc', 'def') -> 'abc/def'
- * Path.join('/', 'abc', 'def/ghi') -> '/abc/def/ghi'
- * Path.join(['/abc/def', 'ghi']) -> '/abc/def/ghi'
- *
- * @return {string} Resulting path.
- */
-PathUtil.join = function() {
-  var components;
-
-  if (arguments.length === 1 && typeof(arguments[0]) === 'object') {
-    components = arguments[0];
-  } else {
-    components = arguments;
-  }
-
-  var path = '';
-  for (var i = 0; i < components.length; i++) {
-    if (components[i][0] === '/') {
-      path = components[i];
-      continue;
-    }
-    if (path.length === 0 || path[path.length - 1] !== '/')
-      path += '/';
-    path += components[i];
-  }
-  return path;
-};
-
-/**
- * @param {string} path Path starting with '/'.
- * @return {RootType} RootType.DOWNLOADS, RootType.DRIVE etc.
- */
-PathUtil.getRootType = function(path) {
-  var rootDir = PathUtil.getTopDirectory(path);
-  for (var type in RootDirectory) {
-    if (rootDir === RootDirectory[type])
-      return RootType[type];
-  }
-};
-
-/**
- * @param {string} path Any path.
- * @return {string} The root path.
- */
-PathUtil.getRootPath = function(path) {
-  var type = PathUtil.getRootType(path);
-
-  if (type == RootType.DOWNLOADS || type == RootType.DRIVE_OFFLINE ||
-      type == RootType.DRIVE_SHARED_WITH_ME || type == RootType.DRIVE_RECENT)
-    return PathUtil.getTopDirectory(path);
-
-  if (type == RootType.DRIVE || type == RootType.ARCHIVE ||
-      type == RootType.REMOVABLE) {
-    var components = PathUtil.split(path);
-    if (components.length > 1) {
-      return PathUtil.join(components[0], components[1]);
-    } else {
-      return components[0];
-    }
-  }
-
-  return '/';
-};
-
-/**
- * @param {string} path A path.
- * @return {boolean} True if it is a path to the root.
- */
-PathUtil.isRootPath = function(path) {
-  return PathUtil.getRootPath(path) === path;
-};
-
-/**
  * Returns the localized name for the root type. If not available, then returns
  * null.
  *