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

ios/chrome/browser/translate/after_translate_infobar_controller.mm

 // Copyright 2013 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.
 
 #include "ios/chrome/browser/translate/after_translate_infobar_controller.h"
 
-#include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/translate/core/browser/translate_infobar_delegate.h"
 #include "ios/chrome/browser/translate/translate_infobar_tags.h"
 #import "ios/chrome/browser/ui/infobars/infobar_view.h"
 #import "ios/chrome/browser/ui/infobars/infobar_view_delegate.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/image/image.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 enum AlwaysTranslateSwitchState {
   ALWAYS_TRANSLATE_SWITCH_NOT_CHANGED,
   ALWAYS_TRANSLATE_SWITCH_SET_TO_ENABLED,
   ALWAYS_TRANSLATE_SWITCH_SET_TO_DISABLED,
 };
 }  // namespace
 
 @interface AfterTranslateInfoBarController () {
   translate::TranslateInfoBarDelegate* _translateInfoBarDelegate;  // weak
   AlwaysTranslateSwitchState _alwaysTranslateSwitchState;
 }
 
 // Action for any of the user defined buttons.
 - (void)infoBarButtonDidPress:(id)sender;
 
 @end
 
 @implementation AfterTranslateInfoBarController
 
 #pragma mark -
 #pragma mark InfoBarControllerProtocol
 
 - (InfoBarView*)viewForDelegate:(infobars::InfoBarDelegate*)delegate
                           frame:(CGRect)frame {
-  base::scoped_nsobject<InfoBarView> infoBarView;
+  InfoBarView* infoBarView;
   _translateInfoBarDelegate = delegate->AsTranslateInfoBarDelegate();
   DCHECK(_translateInfoBarDelegate);
-  infoBarView.reset(
-      [[InfoBarView alloc] initWithFrame:frame delegate:self.delegate]);
+  infoBarView =
+      [[InfoBarView alloc] initWithFrame:frame delegate:self.delegate];
   // Icon
   gfx::Image icon = _translateInfoBarDelegate->GetIcon();
   if (!icon.IsEmpty())
     [infoBarView addLeftIcon:icon.ToUIImage()];
   // Main text.
   const bool autodeterminedSourceLanguage =
       _translateInfoBarDelegate->original_language_code() ==
       translate::kUnknownLanguageCode;
   bool swappedLanguageButtons;
   std::vector<base::string16> strings;
   translate::TranslateInfoBarDelegate::GetAfterTranslateStrings(
       &strings, &swappedLanguageButtons, autodeterminedSourceLanguage);
   DCHECK_EQ(autodeterminedSourceLanguage ? 2U : 3U, strings.size());
   NSString* label1 = base::SysUTF16ToNSString(strings[0]);
   NSString* label2 = base::SysUTF16ToNSString(strings[1]);
   NSString* label3 = autodeterminedSourceLanguage
                          ? @""
                          : base::SysUTF16ToNSString(strings[2]);
   base::string16 stdOriginal =
       _translateInfoBarDelegate->original_language_name();
   NSString* original = base::SysUTF16ToNSString(stdOriginal);
   NSString* target = base::SysUTF16ToNSString(
       _translateInfoBarDelegate->target_language_name());
-  base::scoped_nsobject<NSString> label(
+  NSString* label =
       [[NSString alloc] initWithFormat:@"%@ %@ %@%@ %@.", label1, original,
-                                       label2, label3, target]);
+                                       label2, label3, target];
   [infoBarView addLabel:label];
   // Close button.
   [infoBarView addCloseButtonWithTag:TranslateInfoBarIOSTag::CLOSE
                               target:self
                               action:@selector(infoBarButtonDidPress:)];
   // Other buttons.
   NSString* buttonRevert = l10n_util::GetNSString(IDS_TRANSLATE_INFOBAR_REVERT);
   NSString* buttonOptions = l10n_util::GetNSString(IDS_DONE);
   [infoBarView addButton1:buttonOptions
                      tag1:TranslateInfoBarIOSTag::AFTER_DONE
                   button2:buttonRevert
                      tag2:TranslateInfoBarIOSTag::AFTER_REVERT
                    target:self
                    action:@selector(infoBarButtonDidPress:)];
   // Always translate switch.
   _alwaysTranslateSwitchState = ALWAYS_TRANSLATE_SWITCH_NOT_CHANGED;
   if (_translateInfoBarDelegate->ShouldShowAlwaysTranslateShortcut()) {
     base::string16 alwaysTranslate = l10n_util::GetStringFUTF16(
         IDS_TRANSLATE_INFOBAR_ALWAYS_TRANSLATE, stdOriginal);
     const BOOL switchValue = _translateInfoBarDelegate->ShouldAlwaysTranslate();
     [infoBarView
         addSwitchWithLabel:base::SysUTF16ToNSString(alwaysTranslate)
                       isOn:switchValue
                        tag:TranslateInfoBarIOSTag::ALWAYS_TRANSLATE_SWITCH
                     target:self
                     action:@selector(infoBarSwitchDidPress:)];
   }
-  return [[infoBarView retain] autorelease];
+  return infoBarView;
 }
 
 #pragma mark - Handling of User Events
 
 - (void)infoBarButtonDidPress:(id)sender {
   // This press might have occurred after the user has already pressed a button,
   // in which case the view has been detached from the delegate and this press
   // should be ignored.
   if (!self.delegate) {
     return;
@@ skipping 28 matching lines @@
 
   const bool alwaysTranslate =
       _alwaysTranslateSwitchState == ALWAYS_TRANSLATE_SWITCH_SET_TO_ENABLED;
   if (alwaysTranslate == _translateInfoBarDelegate->ShouldAlwaysTranslate())
     return;
 
   _translateInfoBarDelegate->ToggleAlwaysTranslate();
 }
 
 @end