Revert of [ObjC ARC] Converts ios/chrome/browser/ui/stack_view:stack_view to ARC.

ios/chrome/browser/ui/stack_view/card_stack_layout_manager.h

 // Copyright 2012 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_STACK_VIEW_CARD_STACK_LAYOUT_MANAGER_H_
 #define IOS_CHROME_BROWSER_UI_STACK_VIEW_CARD_STACK_LAYOUT_MANAGER_H_
 
 #import <CoreGraphics/CoreGraphics.h>
 #import <Foundation/Foundation.h>
 
 #include "base/mac/scoped_nsobject.h"
 
 @class StackCard;
 
 // Encapsulates a stack of cards and their layout behavior, supporting
 // fanning the cards out along an axis and gathering them to fit in a given
 // area.
-@interface CardStackLayoutManager : NSObject
+@interface CardStackLayoutManager : NSObject {
+ @private
+  base::scoped_nsobject<NSMutableArray> cards_;
+  // YES if the previous call to one of {|scrollCardAtIndex|,
+  // |handleMultitouchWithFirstDelta|} was to the former method; NO otherwise.
+  BOOL treatOverExtensionAsScroll_;
+  NSUInteger previousFirstPinchCardIndex_;
+  NSUInteger previousSecondPinchCardIndex_;
+}
 
 // The size of a card. Setting this property preserves card origins with the
 // exception that cards are moved as necessary to satisfy placement constraints
 // (e.g., that a card is not placed too far away from its preceding neighbor).
 @property(nonatomic, assign) CGSize cardSize;
 // The center of a card along the axis that is not the layout axis.
 @property(nonatomic, assign) CGFloat layoutAxisPosition;
 // The amount cards should be staggered at full expansion.
 @property(nonatomic, assign) CGFloat maxStagger;
 // The maximum amount that the first card is allowed to overextend toward the
@@ skipping 126 matching lines @@
 
 // The amount that the first card is currently overextended.
 - (CGFloat)overextensionAmount;
 
 // The number of cards visible when stack is fanned out.
 - (NSUInteger)fannedStackCount;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_STACK_VIEW_CARD_STACK_LAYOUT_MANAGER_H_