[fsp] Implement storage::WatcherManager for FSP.

chrome/browser/chromeos/file_system_provider/fileapi/watcher_manager.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/fileapi/watcher_manager.h"
+
+#include "chrome/browser/chromeos/file_system_provider/mount_path_util.h"
+#include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h"
+#include "content/public/browser/browser_thread.h"
+#include "storage/browser/fileapi/file_system_url.h"
+
+using content::BrowserThread;
+
+namespace chromeos {
+namespace file_system_provider {
+
+WatcherManager::WatcherManager() {
+}
+WatcherManager::~WatcherManager() {
+}
+
+void WatcherManager::AddWatcher(
+    const storage::FileSystemURL& url,
+    bool recursive,
+    const StatusCallback& callback,
+    const NotificationCallback& notification_callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  util::FileSystemURLParser parser(url);
+  if (!parser.Parse()) {
+    callback.Run(base::File::FILE_ERROR_SECURITY);
+    return;
+  }
+
+  parser.file_system()->AddWatcher(url.origin(),
+                                   parser.file_path(),
+                                   recursive,
+                                   false /* persistent */,
+                                   callback,
+                                   notification_callback);
+}
+
+void WatcherManager::RemoveWatcher(const storage::FileSystemURL& url,
+                                   bool recursive,
+                                   const StatusCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  util::FileSystemURLParser parser(url);
+  if (!parser.Parse()) {
+    callback.Run(base::File::FILE_ERROR_SECURITY);
+    return;
+  }
+
+  parser.file_system()->RemoveWatcher(
+      url.origin(), parser.file_path(), recursive, callback);
+}
+
+}  // namespace file_system_provider
+}  // namespace chromeos