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

ios/chrome/browser/ui/bookmarks/bookmark_panel_view.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_PANEL_VIEW_H_
 #define IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_PANEL_VIEW_H_
 
 #import <UIKit/UIKit.h>
 
 @class BookmarkPanelView;
@@ skipping 24 matching lines @@
 
 // If a user-driven animation is in progress, these methods have no effect.
 // Calling these methods will invoke delegate callbacks.
 - (void)showMenuAnimated:(BOOL)animated;
 - (void)hideMenuAnimated:(BOOL)animated;
 
 // Even if this method returns NO, the menu can still be in the process of a
 // programmatic animation.
 - (BOOL)userDrivenAnimationInProgress;
 
-@property(nonatomic, assign) id<BookmarkPanelViewDelegate> delegate;
+@property(nonatomic, weak) id<BookmarkPanelViewDelegate> delegate;
 
 // These views should not be modified directly. Instead, subviews should be
 // added to each to create the desired UI.
-@property(nonatomic, retain, readonly) UIView* contentView;
-@property(nonatomic, retain, readonly) UIView* menuView;
+@property(nonatomic, strong, readonly) UIView* contentView;
+@property(nonatomic, strong, readonly) UIView* menuView;
 
 // Whether the menu is being shown. If a user-driven animation is in progress,
 // this property reflects the state of the menu at the beginning of the
 // animation.
 @property(nonatomic, assign, readonly) BOOL showingMenu;
 
 // This method is used to enable or disable swiping in the menu from the left.
 - (void)enableSideSwiping:(BOOL)enable;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_PANEL_VIEW_H_