Ports XMPP Invalidation code from drive_file_sync_service in /sync_file_system to /google_apis/driv…

chrome/browser/google_apis/drive_notification_manager.h

Index: chrome/browser/google_apis/drive_notification_manager.h
diff --git a/chrome/browser/google_apis/drive_notification_manager.h b/chrome/browser/google_apis/drive_notification_manager.h
index 3f1fc6e891fa96101557aa25696a9802abb48ed6..fdd9cc672cb187862805a54df3c1e98d4220bd3a 100644
--- a/chrome/browser/google_apis/drive_notification_manager.h
+++ b/chrome/browser/google_apis/drive_notification_manager.h
@@ -8,6 +8,7 @@
 #include "base/observer_list.h"
 #include "chrome/browser/google_apis/drive_notification_observer.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
+#include "sync/notifier/invalidation_handler.h"
 
 class Profile;
 
@@ -20,7 +21,8 @@ namespace google_apis {
 // 2. Polling timer counts down.
 //    TODO(calvinlo): Also add in backup timer.
 class DriveNotificationManager
-    : public ProfileKeyedService {
+    : public ProfileKeyedService,
+      public syncer::InvalidationHandler {
  public:
   explicit DriveNotificationManager(Profile* profile);
   virtual ~DriveNotificationManager();
@@ -28,17 +30,32 @@ class DriveNotificationManager
   // ProfileKeyedService override.
   virtual void Shutdown() OVERRIDE;
 
-  // TODO(calvinlo): OVERRIDES for syncer::InvalidationHandler go here.
+  // syncer::InvalidationHandler implementation.
+  virtual void OnInvalidatorStateChange(
+      syncer::InvalidatorState state) OVERRIDE;
+  virtual void OnIncomingInvalidation(
+      const syncer::ObjectIdInvalidationMap& invalidation_map) OVERRIDE;
 
   void AddObserver(DriveNotificationObserver* observer);
   void RemoveObserver(DriveNotificationObserver* observer);
 
  private:
   void NotifyObserversToUpdate();
+  void RegisterDriveNotifications();
+  bool IsDriveNotificationSupported();
+  void SetPushNotificationEnabled(syncer::InvalidatorState state);
 
   Profile* profile_;
   ObserverList<DriveNotificationObserver> observers_;
 
+  // XMPP notification related variables.
+  // True when Drive File Sync Service is registered for Drive notifications.
+  bool push_notification_registered_;
+  // True once the first drive notification is received with OK state.
+  bool push_notification_enabled_;
+
+  // TODO(calvinlo): Polling variables to go here.
+
   DISALLOW_COPY_AND_ASSIGN(DriveNotificationManager);
 };