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

ios/chrome/browser/ui/main/browser_view_wrangler.mm

Index: ios/chrome/browser/ui/main/browser_view_wrangler.mm
diff --git a/ios/chrome/browser/ui/main/browser_view_wrangler.mm b/ios/chrome/browser/ui/main/browser_view_wrangler.mm
index accb6c1a6749f8ecf427a9499bef2c1530f03e73..bae8fb0b1738d92b4c22abb19f27ba7c5abb6517 100644
--- a/ios/chrome/browser/ui/main/browser_view_wrangler.mm
+++ b/ios/chrome/browser/ui/main/browser_view_wrangler.mm
@@ -4,8 +4,6 @@
 
 #import "ios/chrome/browser/ui/main/browser_view_wrangler.h"
 
-#include "base/mac/objc_property_releaser.h"
-#import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
@@ -24,17 +22,19 @@
 #import "ios/chrome/browser/ui/browser_view_controller_dependency_factory.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface BrowserViewWrangler ()<TabModelObserver> {
   ios::ChromeBrowserState* _browserState;
   __unsafe_unretained id<TabModelObserver> _tabModelObserver;
   BOOL _isShutdown;
-
-  base::mac::ObjCPropertyReleaser _propertyReleaser_BrowserViewWrangler;
 }
 
 // Responsible for maintaining all state related to sharing to other devices.
 // Redeclared readwrite from the readonly declaration in the Testing interface.
-@property(nonatomic, retain, readwrite)
+@property(nonatomic, strong, readwrite)
     DeviceSharingManager* deviceSharingManager;
 
 // Creates a new autoreleased tab model for |browserState|; if |empty| is NO,
@@ -69,8 +69,6 @@
 - (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
                     tabModelObserver:(id<TabModelObserver>)tabModelObserver {
   if ((self = [super init])) {
-    _propertyReleaser_BrowserViewWrangler.Init(self,
-                                               [BrowserViewWrangler class]);
     _browserState = browserState;
     _tabModelObserver = tabModelObserver;
   }
@@ -84,7 +82,6 @@
 
 - (void)dealloc {
   DCHECK(_isShutdown) << "-shutdown must be called before -dealloc";
-  [super dealloc];
 }
 
 #pragma mark - BrowserViewInformation property implementations
@@ -108,10 +105,9 @@
   if (_mainBVC) {
     [_mainBVC browserStateDestroyed];
     [_mainBVC shutdown];
-    [_mainBVC autorelease];
   }
 
-  _mainBVC = [mainBVC retain];
+  _mainBVC = mainBVC;
 }
 
 - (TabModel*)mainTabModel {
@@ -135,10 +131,9 @@
       [_mainTabModel removeObserver:_tabModelObserver];
     }
     [_mainTabModel removeObserver:self];
-    [_mainTabModel autorelease];
   }
 
-  _mainTabModel = [mainTabModel retain];
+  _mainTabModel = mainTabModel;
 }
 
 - (BrowserViewController*)otrBVC {
@@ -163,10 +158,9 @@
   if (_otrBVC) {
     [_otrBVC browserStateDestroyed];
     [_otrBVC shutdown];
-    [_otrBVC autorelease];
   }
 
-  _otrBVC = [otrBVC retain];
+  _otrBVC = otrBVC;
 }
 
 - (TabModel*)otrTabModel {
@@ -186,10 +180,9 @@
       [_otrTabModel removeObserver:_tabModelObserver];
     }
     [_otrTabModel removeObserver:self];
-    [_otrTabModel autorelease];
   }
 
-  _otrTabModel = [otrTabModel retain];
+  _otrTabModel = otrTabModel;
 }
 
 - (void)setCurrentBVC:(BrowserViewController*)bvc
@@ -259,8 +252,7 @@
 
 - (void)updateDeviceSharingManager {
   if (!self.deviceSharingManager) {
-    self.deviceSharingManager =
-        [[[DeviceSharingManager alloc] init] autorelease];
+    self.deviceSharingManager = [[DeviceSharingManager alloc] init];
   }
   [self.deviceSharingManager updateBrowserState:_browserState];
 
@@ -375,9 +367,9 @@
 
   // Create tab model from saved session (nil is ok).
   TabModel* tabModel =
-      [[[TabModel alloc] initWithSessionWindow:sessionWindow
-                                sessionService:[SessionServiceIOS sharedService]
-                                  browserState:browserState] autorelease];
+      [[TabModel alloc] initWithSessionWindow:sessionWindow
+                               sessionService:[SessionServiceIOS sharedService]
+                                 browserState:browserState];
   // Add observers.
   if (_tabModelObserver) {
     [tabModel addObserver:_tabModelObserver];
@@ -391,12 +383,12 @@
 - (BrowserViewController*)bvcForBrowserState:
                               (ios::ChromeBrowserState*)browserState
                                     tabModel:(TabModel*)tabModel {
-  base::scoped_nsobject<BrowserViewControllerDependencyFactory> factory(
+  BrowserViewControllerDependencyFactory* factory =
       [[BrowserViewControllerDependencyFactory alloc]
-          initWithBrowserState:browserState]);
-  return [[[BrowserViewController alloc] initWithTabModel:tabModel
-                                             browserState:browserState
-                                        dependencyFactory:factory] autorelease];
+          initWithBrowserState:browserState];
+  return [[BrowserViewController alloc] initWithTabModel:tabModel
+                                            browserState:browserState
+                                       dependencyFactory:factory];
 }
 
 @end