[fsp] Separate logic for saving/restoring state to a separate class.

chrome/browser/chromeos/file_system_provider/provided_file_system_unittest.cc

Index: chrome/browser/chromeos/file_system_provider/provided_file_system_unittest.cc
diff --git a/chrome/browser/chromeos/file_system_provider/provided_file_system_unittest.cc b/chrome/browser/chromeos/file_system_provider/provided_file_system_unittest.cc
index 45d5bc226201aeb26ece08ee3f6f52bc36299a9c..8404c70f61988926a0f4121a46f15af32ee81bae 100644
--- a/chrome/browser/chromeos/file_system_provider/provided_file_system_unittest.cc
+++ b/chrome/browser/chromeos/file_system_provider/provided_file_system_unittest.cc
@@ -124,7 +124,7 @@ class Observer : public ProvidedFileSystemObserver {
   // ProvidedFileSystemInterfaceObserver overrides.
   virtual void OnObservedEntryChanged(
       const ProvidedFileSystemInfo& file_system_info,
-      const base::FilePath& observed_path,
+      const ObservedEntry& observed_entry,
       ProvidedFileSystemObserver::ChangeType change_type,
       const ProvidedFileSystemObserver::ChildChanges& child_changes,
       const base::Closure& callback) override {
@@ -135,8 +135,7 @@ class Observer : public ProvidedFileSystemObserver {
 
   virtual void OnObservedEntryTagUpdated(
       const ProvidedFileSystemInfo& file_system_info,
-      const base::FilePath& observed_path,
-      const std::string& tag) override {
+      const ObservedEntry& observed_entry) override {
     EXPECT_EQ(kFileSystemId, file_system_info.file_system_id());
     ++tag_updated_counter_;
   }