[ObjC ARC] Converts ios/chrome/today_extension:today_extension to ARC.

ios/chrome/today_extension/today_view_controller.mm

 // 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.
 
 #import "ios/chrome/today_extension/today_view_controller.h"
 
 #import <CommonCrypto/CommonDigest.h>
 #import <NotificationCenter/NotificationCenter.h>
 #include <unistd.h>
 
@@ skipping 358 matching lines @@
       setLayoutMargins:UIEdgeInsetsMake(ui_util::kFirstLineButtonMargin,
                                         firstLineOuterMargin,
                                         ui_util::kFirstLineButtonMargin,
                                         firstLineOuterMargin)];
 
   _urlsTable.reset([[UITableView alloc] initWithFrame:CGRectZero]);
   [_urlsTable setDataSource:self];
   [_urlsTable setRowHeight:ui_util::kSecondLineHeight];
   [_urlsTable setSeparatorStyle:UITableViewCellSeparatorStyleNone];
   _tableViewHeight.reset(
-      [[[_urlsTable heightAnchor] constraintEqualToConstant:0] retain]);
+      [[_urlsTable heightAnchor] constraintEqualToConstant:0]);
   [_tableViewHeight setActive:YES];
 
   _contentStackView.reset([[UIStackView alloc]
       initWithArrangedSubviews:@[ _buttonsView, _urlsTable ]]);
   [[_urlsTable widthAnchor]
       constraintEqualToAnchor:[_contentStackView widthAnchor]]
       .active = YES;
   [_contentStackView setAxis:UILayoutConstraintAxisVertical];
   [_contentStackView setDistribution:UIStackViewDistributionFill];
   [_contentStackView setSpacing:0];
@@ skipping 138 matching lines @@
     return;
   if (footerLabel == PW_OPTIN_DIALOG &&
       _currentFooterLabel != PW_OPTIN_DIALOG) {
     TodayMetricsLogger::GetInstance()->RecordUserAction(
         base::UserMetricsAction("PhysicalWeb.OptinDisplayed"));
   }
 
   _currentFooterLabel = footerLabel;
   [[_footerLabel view] removeFromSuperview];
   base::WeakNSObject<TodayViewController> weakSelf(self);
-  base::mac::ScopedBlock<ProceduralBlock> learnMoreBlock;
-  base::mac::ScopedBlock<ProceduralBlock> turnOffPhysicalWeb;
-  base::mac::ScopedBlock<ProceduralBlock> turnOnPhysicalWeb;
-  base::mac::ScopedBlock<ProceduralBlock> optInPhysicalWeb;
-  base::mac::ScopedBlock<ProceduralBlock> optOutPhysicalWeb;
+  ProceduralBlock learnMoreBlock = ^{
+    [weakSelf learnMore];
+  };
 
-  learnMoreBlock.reset(
-      ^{
-        [weakSelf learnMore];
-      },
-      base::scoped_policy::RETAIN);
+  ProceduralBlock turnOffPhysicalWeb;
+  ProceduralBlock turnOnPhysicalWeb;
+  ProceduralBlock optInPhysicalWeb;
+  ProceduralBlock optOutPhysicalWeb;
+
   if (![[LockScreenState sharedInstance] isScreenLocked]) {
-    turnOffPhysicalWeb.reset(
-        ^{
-          [weakSelf setPhysicalWebEnabled:NO];
-        },
-        base::scoped_policy::RETAIN);
+    turnOffPhysicalWeb = ^{
+      [weakSelf setPhysicalWebEnabled:NO];
+    };
 
-    turnOnPhysicalWeb.reset(
-        ^{
-          [weakSelf setPhysicalWebEnabled:YES];
-        },
-        base::scoped_policy::RETAIN);
+    turnOnPhysicalWeb = ^{
+      [weakSelf setPhysicalWebEnabled:YES];
+    };
 
-    optInPhysicalWeb.reset(
-        ^{
-          [weakSelf physicalWebOptIn];
-        },
-        base::scoped_policy::RETAIN);
+    optInPhysicalWeb = ^{
+      [weakSelf physicalWebOptIn];
+    };
 
-    optOutPhysicalWeb.reset(
-        ^{
-          [weakSelf physicalWebOptOut];
-        },
-        base::scoped_policy::RETAIN);
+    optOutPhysicalWeb = ^{
+      [weakSelf physicalWebOptOut];
+    };
   }
 
   switch (footerLabel) {
     case NO_FOOTER_LABEL:
       _footerLabel.reset();
       break;
     case PW_IS_OFF_FOOTER_LABEL:
       _footerLabel.reset([[PWIsOffFooterLabel alloc]
           initWithLearnMoreBlock:learnMoreBlock
                      turnOnBlock:turnOnPhysicalWeb]);
@@ skipping 388 matching lines @@
   if (cell) {
     [cell setTitle:l10n_util::GetNSString(
                        IDS_IOS_OPEN_COPIED_LINK_TODAY_EXTENSION)
                url:_pasteURL];
 
   } else {
     base::WeakNSObject<TodayViewController> weakSelf(self);
     URLActionBlock action = ^(NSString* url) {
       [weakSelf openClipboardURLInChrome:url];
     };
-    cell = [[[URLTableCell alloc]
+    cell = [[URLTableCell alloc]
           initWithTitle:l10n_util::GetNSString(
                             IDS_IOS_OPEN_COPIED_LINK_TODAY_EXTENSION)
                     url:_pasteURL
                    icon:@"todayview_clipboard"
               leftInset:_defaultLeadingMarginInset
         reuseIdentifier:pasteboardReusableID
-                  block:action] autorelease];
+                  block:action];
     cell.selectionStyle = UITableViewCellSelectionStyleNone;
   }
   return cell;
 }
 
 - (URLTableCell*)cellForShowMore {
   NSString* showMoreReusableID = @"ShowMoreCell";
   URLTableCell* cell = base::mac::ObjCCast<URLTableCell>(
       [_urlsTable dequeueReusableCellWithIdentifier:showMoreReusableID]);
   NSString* title = l10n_util::GetNSString(
       IDS_IOS_PYSICAL_WEB_TODAY_EXTENSION_SHOW_MORE_BEACONS);
   if (cell) {
     [cell setTitle:title url:@""];
   } else {
     base::WeakNSObject<TodayViewController> weakSelf(self);
     URLActionBlock action = ^(NSString* url) {
       [weakSelf setDisplayAllPhysicalWebItems:YES];
       [weakSelf refreshWidget];
     };
-    cell = [[[URLTableCell alloc] initWithTitle:title
-                                            url:@""
-                                           icon:@""
-                                      leftInset:_defaultLeadingMarginInset
-                                reuseIdentifier:showMoreReusableID
-                                          block:action] autorelease];
+    cell = [[URLTableCell alloc] initWithTitle:title
+                                           url:@""
+                                          icon:@""
+                                     leftInset:_defaultLeadingMarginInset
+                               reuseIdentifier:showMoreReusableID
+                                         block:action];
     cell.selectionStyle = UITableViewCellSelectionStyleNone;
   }
   return cell;
 }
 
 - (URLTableCell*)cellForPhysicalWebURLAtIndex:(NSInteger)index {
   NSString* physicalWebReusableID = @"PhysicalWebCell";
   URLTableCell* cell = base::mac::ObjCCast<URLTableCell>(
       [_urlsTable dequeueReusableCellWithIdentifier:physicalWebReusableID]);
   PhysicalWebDevice* device = [[_scanner devices] objectAtIndex:index];
   if (cell) {
     [cell setTitle:[device title] url:[[device url] absoluteString]];
   } else {
     base::WeakNSObject<TodayViewController> weakSelf(self);
     URLActionBlock action = ^(NSString* url) {
       [weakSelf openPhysicalWebURLInChrome:url];
     };
-    cell = [[[URLTableCell alloc] initWithTitle:[device title]
-                                            url:[[device url] absoluteString]
-                                           icon:@"todayview_physical_web"
-                                      leftInset:_defaultLeadingMarginInset
-                                reuseIdentifier:physicalWebReusableID
-                                          block:action] autorelease];
+    cell = [[URLTableCell alloc] initWithTitle:[device title]
+                                           url:[[device url] absoluteString]
+                                          icon:@"todayview_physical_web"
+                                     leftInset:_defaultLeadingMarginInset
+                               reuseIdentifier:physicalWebReusableID
+                                         block:action];
     cell.selectionStyle = UITableViewCellSelectionStyleNone;
   }
   return cell;
 }
 
 - (UITableViewCell*)tableView:(UITableView*)tableView
         cellForRowAtIndexPath:(NSIndexPath*)indexPath {
   DCHECK(tableView == _urlsTable.get());
   NSInteger indexRequested = [indexPath row];
   NSInteger lastRowIndex =
@@ skipping 50 matching lines @@
     if (ui_util::IsRTL()) {
       _defaultLeadingMarginInset = defaultMarginInsets.right;
     } else {
       _defaultLeadingMarginInset = defaultMarginInsets.left;
     }
   }
   return UIEdgeInsetsZero;
 }
 
 @end