DriveFileSyncService listens to OnAuthenticated event to recover from unavailable state

chrome/browser/sync_file_system/drive_file_sync_service.cc

Index: chrome/browser/sync_file_system/drive_file_sync_service.cc
diff --git a/chrome/browser/sync_file_system/drive_file_sync_service.cc b/chrome/browser/sync_file_system/drive_file_sync_service.cc
index 1ab7c8e6823a477dad3e6cf3bae1c89d11ad724a..0e01e8410335314b4fd766909862766946777a71 100644
--- a/chrome/browser/sync_file_system/drive_file_sync_service.cc
+++ b/chrome/browser/sync_file_system/drive_file_sync_service.cc
@@ -13,7 +13,6 @@
 #include "base/message_loop_proxy.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
-#include "chrome/browser/google_apis/gdata_wapi_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync_file_system/drive_file_sync_client.h"
 #include "chrome/browser/sync_file_system/drive_file_sync_util.h"
@@ -139,6 +138,7 @@ DriveFileSyncService::DriveFileSyncService(Profile* profile)
   token_.reset(new TaskToken(AsWeakPtr()));
 
   sync_client_.reset(new DriveFileSyncClient(profile));
+  sync_client_->AddObserver(this);
 
   metadata_store_.reset(new DriveMetadataStore(
       profile->GetPath(),
@@ -155,6 +155,7 @@ DriveFileSyncService::~DriveFileSyncService() {
   // Invalidate WeakPtr instances here explicitly to notify TaskToken that we
   // can safely discard the token.
   weak_factory_.InvalidateWeakPtrs();
+  sync_client_->RemoveObserver(this);
   token_.reset();
 }
 
@@ -372,6 +373,12 @@ void DriveFileSyncService::ApplyLocalChange(
                       callback, fileapi::SYNC_STATUS_FAILED);
 }
 
+void DriveFileSyncService::OnAuthenticated() {
+  FOR_EACH_OBSERVER(
+        Observer, observers_,
+        OnRemoteServiceStateUpdated(REMOTE_SERVICE_OK, "Authenticated"));

[kinuko, 2012/11/30 08:59:35]

DriveFileSyncService is also keeping the current state as state_. Can you also
update the state?

Can you add DVLOG as well?

[nhiroki, 2012/11/30 09:08:58]

Done.

+}
+
 // Called by CreateForTesting.
 DriveFileSyncService::DriveFileSyncService(
     scoped_ptr<DriveFileSyncClient> sync_client,