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

ios/chrome/browser/ui/omnibox/omnibox_view_ios.mm

 // Copyright (c) 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.
 
 #include "ios/chrome/browser/ui/omnibox/omnibox_view_ios.h"
 
 #import <CoreText/CoreText.h>
 #import <MobileCoreServices/MobileCoreServices.h>
 
 #include "base/auto_reset.h"
@@ skipping 20 matching lines @@
 #include "ios/chrome/grit/ios_theme_resources.h"
 #include "ios/web/public/referrer.h"
 #import "net/base/mac/url_conversions.h"
 #include "skia/ext/skia_utils_ios.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/gfx/image/image.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using base::UserMetricsAction;
 
 namespace {
 // The color of the rest of the URL (i.e. after the TLD) in the omnibox.
 UIColor* BaseTextColor() {
   return [UIColor colorWithWhite:(161 / 255.0) alpha:1.0];
 }
 
 // The color of the https when there is an error.
 UIColor* ErrorTextColor() {
@@ skipping 113 matching lines @@
 
 OmniboxViewIOS::OmniboxViewIOS(OmniboxTextFieldIOS* field,
                                WebOmniboxEditController* controller,
                                ios::ChromeBrowserState* browser_state,
                                id<PreloadProvider> preloader,
                                id<OmniboxPopupPositioner> positioner)
     : OmniboxView(
           controller,
           base::MakeUnique<ChromeOmniboxClientIOS>(controller, browser_state)),
       browser_state_(browser_state),
-      field_([field retain]),
+      field_(field),
       controller_(controller),
       preloader_(preloader),
       ignore_popup_updates_(false),
       attributing_display_string_(nil) {
   popup_view_.reset(new OmniboxPopupViewIOS(this, model(), positioner));
   field_delegate_.reset(
       [[AutocompleteTextFieldDelegate alloc] initWithEditView:this]);
   [field_ setDelegate:field_delegate_];
   [field_ addTarget:field_delegate_
                 action:@selector(textFieldDidChange:)
@@ skipping 492 matching lines @@
   UIColor* color = GetSecureTextColor(security_level, [field_ incognito]);
   if (color) {
     [attributing_display_string_ addAttribute:NSForegroundColorAttributeName
                                         value:color
                                         range:range.ToNSRange()];
   }
 }
 
 NSAttributedString* OmniboxViewIOS::ApplyTextAttributes(
     const base::string16& text) {
-  NSMutableAttributedString* as = [[[NSMutableAttributedString alloc]
-      initWithString:base::SysUTF16ToNSString(text)] autorelease];
+  NSMutableAttributedString* as = [[NSMutableAttributedString alloc]
+      initWithString:base::SysUTF16ToNSString(text)];
   // Cache a pointer to the attributed string to allow the superclass'
   // virtual method invocations to add attributes.
   DCHECK(attributing_display_string_ == nil);
   base::AutoReset<NSMutableAttributedString*> resetter(
       &attributing_display_string_, as);
   UpdateTextStyle(text, AutocompleteSchemeClassifierImpl());
   return as;
 }
 
 void OmniboxViewIOS::UpdateAppearance() {
@@ skipping 170 matching lines @@
 // is being left out for now because it was not present before the OmniboxView
 // rewrite.
 #if 0
   // When editing is in progress, the url text is not colored, so there is
   // nothing to emphasize.  (Calling SetText() in that situation would also be
   // harmful, as it would reset the carat position to the end of the text.)
   if (!IsEditingOrEmpty())
     SetText(GetText());
 #endif
 }