Cleanup handoff_manager.h header.

components/handoff/handoff_manager.h

Index: components/handoff/handoff_manager.h
diff --git a/components/handoff/handoff_manager.h b/components/handoff/handoff_manager.h
index 19bde22ee543f6b74d248f4ffae3e1f6e3cea3f9..0d390832d871a55225c2889fff825f614c5f4111 100644
--- a/components/handoff/handoff_manager.h
+++ b/components/handoff/handoff_manager.h
@@ -7,7 +7,6 @@
 
 #include <Foundation/Foundation.h>
 
-#include "base/mac/objc_property_releaser.h"
 #include "build/build_config.h"
 #include "components/handoff/handoff_utility.h"
 #include "url/gurl.h"
@@ -22,14 +21,7 @@ class PrefRegistrySyncable;
 
 // Maintains all of the state relevant to the Handoff feature. Allows Chrome to
 // hand off the current active URL to other devices.
-@interface HandoffManager : NSObject {
- @private
-  base::mac::ObjCPropertyReleaser _propertyReleaser_HandoffManager;
-
-  GURL _activeURL;
-  NSUserActivity* _userActivity;
-  handoff::Origin _origin;
-}
+@interface HandoffManager : NSObject
 
 #if defined(OS_IOS)
 // Registers preferences related to Handoff.