[fsp] Rename ObserveEntry with AddWatcher.

chrome/browser/chromeos/file_system_provider/observed_entry.cc

-// Copyright 2014 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.
-
-#include "chrome/browser/chromeos/file_system_provider/observed_entry.h"
-
-namespace chromeos {
-namespace file_system_provider {
-
-ObservedEntryKey::ObservedEntryKey(const base::FilePath& entry_path,
-                                   bool recursive)
-    : entry_path(entry_path), recursive(recursive) {
-}
-
-ObservedEntryKey::~ObservedEntryKey() {
-}
-
-bool ObservedEntryKey::Comparator::operator()(const ObservedEntryKey& a,
-                                              const ObservedEntryKey& b) const {
-  if (a.entry_path != b.entry_path)
-    return a.entry_path < b.entry_path;
-  return a.recursive < b.recursive;
-}
-
-Subscriber::Subscriber() : persistent(false) {
-}
-
-Subscriber::~Subscriber() {
-}
-
-ObservedEntry::ObservedEntry() : recursive(false) {
-}
-
-ObservedEntry::~ObservedEntry() {
-}
-
-}  // namespace file_system_provider
-}  // namespace chromeos