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

ios/chrome/browser/ui/history/history_entry_item_unittest.mm

 // Copyright 2016 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/browser/ui/history/history_entry_item.h"
 
 #include "base/i18n/time_formatting.h"
-#include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "ios/chrome/browser/ui/history/history_entry.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 const char kTestUrl[] = "http://test/";
 const char kTestUrl2[] = "http://test2/";
 const char kTestTitle[] = "Test";
 }
 
 HistoryEntryItem* GetHistoryEntryItem(const GURL& url,
                                       const char title[],
                                       base::Time timestamp) {
   history::HistoryEntry entry = history::HistoryEntry(
       history::HistoryEntry::LOCAL_ENTRY, GURL(url), base::UTF8ToUTF16(title),
       timestamp, "", false, base::string16(), false);
-  HistoryEntryItem* item =
-      [[[HistoryEntryItem alloc] initWithType:0
-                                 historyEntry:entry
-                                 browserState:nil
-                                     delegate:nil] autorelease];
+  HistoryEntryItem* item = [[HistoryEntryItem alloc] initWithType:0
+                                                     historyEntry:entry
+                                                     browserState:nil
+                                                         delegate:nil];
   return item;
 }
 
 // Tests that -[HistoryEntryItem configureCell:] sets the cell's textLabel text
 // to the item title, the detailTextLabel text to the URL, and the timeLabel
 // text to the timestamp.
 TEST(HistoryEntryItemTest, ConfigureCell) {
   base::Time timestamp = base::Time::Now();
   HistoryEntryItem* item =
       GetHistoryEntryItem(GURL(kTestUrl), kTestTitle, timestamp);
 
-  base::scoped_nsobject<HistoryEntryCell> cell([[[item cellClass] alloc] init]);
+  HistoryEntryCell* cell = [[[item cellClass] alloc] init];
   EXPECT_TRUE([cell isMemberOfClass:[HistoryEntryCell class]]);
   [item configureCell:cell];
-  EXPECT_NSEQ(base::SysUTF8ToNSString(kTestTitle), cell.get().textLabel.text);
-  EXPECT_NSEQ(base::SysUTF8ToNSString(kTestUrl),
-              cell.get().detailTextLabel.text);
+  EXPECT_NSEQ(base::SysUTF8ToNSString(kTestTitle), cell.textLabel.text);
+  EXPECT_NSEQ(base::SysUTF8ToNSString(kTestUrl), cell.detailTextLabel.text);
   EXPECT_NSEQ(base::SysUTF16ToNSString(base::TimeFormatTimeOfDay(timestamp)),
-              cell.get().timeLabel.text);
+              cell.timeLabel.text);
 }
 
 // Tests that -[HistoryItem isEqualToHistoryItem:] returns YES if the two items
 // have the same URL and timestamp, and NO otherwise.
 TEST(HistoryEntryItemTest, IsEqual) {
   base::Time timestamp = base::Time::Now();
   base::Time timestamp2 = timestamp - base::TimeDelta::FromMinutes(1);
   HistoryEntryItem* history_entry =
       GetHistoryEntryItem(GURL(kTestUrl), kTestTitle, timestamp);
   HistoryEntryItem* same_entry =
       GetHistoryEntryItem(GURL(kTestUrl), kTestTitle, timestamp);
 
   HistoryEntryItem* different_time_entry =
       GetHistoryEntryItem(GURL(kTestUrl), kTestTitle, timestamp2);
   HistoryEntryItem* different_url_entry =
       GetHistoryEntryItem(GURL(kTestUrl2), kTestTitle, timestamp);
 
   EXPECT_TRUE([history_entry isEqualToHistoryEntryItem:same_entry]);
   EXPECT_FALSE([history_entry isEqualToHistoryEntryItem:different_time_entry]);
   EXPECT_FALSE([history_entry isEqualToHistoryEntryItem:different_url_entry]);
 }