Revert of [ObjC ARC] Converts crw_web_controller to ARC.

ios/web/web_state/ui/crw_web_controller.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_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_
 #define IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/web/net/crw_request_tracker_delegate.h"
@@ skipping 54 matching lines @@
 // TODO(stuartmorgan): Move all of the navigation APIs out of this class.
 @interface CRWWebController : NSObject<CRWJSInjectionEvaluator,
                                        CRWRequestTrackerDelegate,
                                        CRWTouchTrackingDelegate,
                                        UIGestureRecognizerDelegate>
 
 // Whether or not a UIWebView is allowed to exist in this CRWWebController.
 // Defaults to NO; this should be enabled before attempting to access the view.
 @property(nonatomic, assign) BOOL webUsageEnabled;
 
-@property(nonatomic, weak) id<CRWWebDelegate> delegate;
+@property(nonatomic, assign) id<CRWWebDelegate> delegate;
 @property(nonatomic, weak) id<CRWWebUserInterfaceDelegate> UIDelegate;
-@property(nonatomic, weak) id<CRWNativeContentProvider> nativeProvider;
-@property(nonatomic, weak) id<CRWSwipeRecognizerProvider>
-    swipeRecognizerProvider;
+@property(nonatomic, assign) id<CRWNativeContentProvider> nativeProvider;
+@property(nonatomic, assign)
+    id<CRWSwipeRecognizerProvider> swipeRecognizerProvider;
 @property(nonatomic, readonly) web::WebState* webState;
 @property(nonatomic, readonly) web::WebStateImpl* webStateImpl;
 
 // The container view used to display content.  If the view has been purged due
 // to low memory, this will recreate it.
-@property(nonatomic, strong, readonly) UIView* view;
+@property(nonatomic, readonly) UIView* view;
 
 // The web view proxy associated with this controller.
-@property(nonatomic, strong, readonly) id<CRWWebViewProxy> webViewProxy;
+@property(nonatomic, readonly) id<CRWWebViewProxy> webViewProxy;
 
 // The view that generates print data when printing. It is nil if printing
 // is not supported.
-@property(nonatomic, strong, readonly) UIView* viewForPrinting;
+@property(nonatomic, readonly) UIView* viewForPrinting;
 
 // Content view was reset due to low memory.  Use placeholder overlay view on
 // next creation.
-@property(nonatomic, assign) BOOL usePlaceholderOverlay;
+@property(nonatomic, readwrite, assign) BOOL usePlaceholderOverlay;
 
 // Returns the current page loading phase.
-@property(nonatomic, readonly, assign) web::LoadPhase loadPhase;
+@property(nonatomic, readonly) web::LoadPhase loadPhase;
 
 // The fraction of the page load that has completed as a number between 0.0
 // (nothing loaded) and 1.0 (fully loaded).
 @property(nonatomic, readonly) double loadingProgress;
 
 // Returns whether the page can navigate backwards or forwards.
 @property(nonatomic, readonly) BOOL canGoBack;
 @property(nonatomic, readonly) BOOL canGoForward;
 
 // Returns the x, y offset the content has been scrolled.
@@ skipping 210 matching lines @@
 
 // Acts on a single message from the JS object, parsed from JSON into a
 // DictionaryValue. Returns NO if the format for the message was invalid.
 - (BOOL)respondToMessage:(base::DictionaryValue*)crwMessage
        userIsInteracting:(BOOL)userIsInteracting
                originURL:(const GURL&)originURL;
 
 @end
 
 #endif  // IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_