[ObjC ARC] Converts ios/chrome/browser/ui/ntp:ntp_internal to ARC.

ios/chrome/browser/ui/ntp/new_tab_page_controller.h

Index: ios/chrome/browser/ui/ntp/new_tab_page_controller.h
diff --git a/ios/chrome/browser/ui/ntp/new_tab_page_controller.h b/ios/chrome/browser/ui/ntp/new_tab_page_controller.h
index b4bc70c9b64ff16dab7447a01b416f8c728524c6..f6466f516f575a068987ea31288338da2cd37cb3 100644
--- a/ios/chrome/browser/ui/ntp/new_tab_page_controller.h
+++ b/ios/chrome/browser/ui/ntp/new_tab_page_controller.h
@@ -74,16 +74,9 @@ std::string FragmentFromIdentifier(PanelIdentifier panel);
                               NewTabPagePanelControllerDelegate,
                               ToolbarOwner,
                               UIGestureRecognizerDelegate,
-                              UIScrollViewDelegate> {
- @private
-  base::scoped_nsobject<BookmarkHomeTabletNTPController> bookmarkController_;
-  base::scoped_nsobject<GoogleLandingViewController> googleLandingController_;
-  base::scoped_nsprotocol<id<NewTabPagePanelProtocol>> incognitoController_;
-  // The currently visible controller, one of the above.
-  id<NewTabPagePanelProtocol> currentController_;  // weak
-}
+                              UIScrollViewDelegate>
 
-@property(nonatomic, assign) id<CRWSwipeRecognizerProvider>
+@property(nonatomic, weak) id<CRWSwipeRecognizerProvider>
     swipeRecognizerProvider;
 
 // Init with the given url (presumably "chrome://newtab") and loader object.