[fsp] Extract ObservedEntry and ObservedEntries to a separate file.

chrome/browser/chromeos/file_system_provider/service.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/service.h"
 
 #include "base/files/file_path.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/stl_util.h"
@@ skipping 319 matching lines @@
     const ProvidedFileSystemInfo& file_system_info,
     const base::FilePath& observed_path,
     ChangeType change_type,
     const ChildChanges& child_changes,
     const base::Closure& callback) {
   callback.Run();
 }
 
 void Service::OnObservedEntryTagUpdated(
     const ProvidedFileSystemInfo& file_system_info,
-    const base::FilePath& observed_path) {
+    const base::FilePath& observed_path,
+    const std::string& tag) {
   // TODO(mtomasz): Store tags of observed entries in preferences, or better
   // in leveldb.
 }
 
 void Service::OnObservedEntryListChanged(
-    const ProvidedFileSystemInfo& file_system_info) {
+    const ProvidedFileSystemInfo& file_system_info,
+    const ObservedEntries& observed_entries) {
   // TODO(mtomasz): Store observed entries in preferences or leveldb.
 }
 
 void Service::RememberFileSystem(
     const ProvidedFileSystemInfo& file_system_info) {
   base::DictionaryValue* file_system = new base::DictionaryValue();
   file_system->SetStringWithoutPathExpansion(kPrefKeyFileSystemId,
                                              file_system_info.file_system_id());
   file_system->SetStringWithoutPathExpansion(kPrefKeyDisplayName,
                                              file_system_info.display_name());
@@ skipping 98 matching lines @@
                  << ", " << display_name << ".";
       // Since remounting of the file system failed, then remove it from
       // preferences to avoid remounting it over and over again with a failure.
       ForgetFileSystem(extension_id, file_system_id);
     }
   }
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos