DriveFileSyncService listens to OnAuthenticated event to recover from unavailable state

chrome/browser/sync_file_system/drive_file_sync_client_unittest.cc

Index: chrome/browser/sync_file_system/drive_file_sync_client_unittest.cc
diff --git a/chrome/browser/sync_file_system/drive_file_sync_client_unittest.cc b/chrome/browser/sync_file_system/drive_file_sync_client_unittest.cc
index f42bc49be9984faa4d12f968b7d9560228da6f2f..4850252c24236303e8fe672d254ab42fd3838dc2 100644
--- a/chrome/browser/sync_file_system/drive_file_sync_client_unittest.cc
+++ b/chrome/browser/sync_file_system/drive_file_sync_client_unittest.cc
@@ -136,6 +136,7 @@ class DriveFileSyncClientTest : public testing::Test {
     fake_drive_uploader_ = new FakeDriveUploader;
 
     EXPECT_CALL(*mock_drive_service_, Initialize(&profile_)).Times(1);
+    EXPECT_CALL(*mock_drive_service_, AddObserver(_));
 
     sync_client_ = DriveFileSyncClient::CreateForTesting(
         &profile_,
@@ -144,6 +145,7 @@ class DriveFileSyncClientTest : public testing::Test {
   }
 
   virtual void TearDown() OVERRIDE {
+    EXPECT_CALL(*mock_drive_service_, RemoveObserver(_));
     EXPECT_CALL(*mock_drive_service(), CancelAll());
     sync_client_.reset();
   }