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

ios/chrome/browser/ui/omnibox/omnibox_popup_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_popup_view_ios.h"
 
 #import <QuartzCore/QuartzCore.h>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 12 matching lines @@
 #import "ios/chrome/browser/ui/omnibox/omnibox_popup_positioner.h"
 #include "ios/chrome/browser/ui/omnibox/omnibox_util.h"
 #include "ios/chrome/browser/ui/omnibox/omnibox_view_ios.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_theme_resources.h"
 #include "ios/web/public/web_thread.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ui/gfx/geometry/rect.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 const CGFloat kExpandAnimationDuration = 0.1;
 const CGFloat kCollapseAnimationDuration = 0.05;
 const CGFloat kWhiteBackgroundHeight = 74;
 NS_INLINE CGFloat ShadowHeight() {
   return IsIPadIdiom() ? 10 : 0;
 }
 }  // namespace
 
 using base::UserMetricsAction;
@@ skipping 23 matching lines @@
   // Adjust popupView_'s anchor point and height so that it animates down
   // from the top when it appears.
   popupLayer.anchorPoint = CGPointMake(0.5, 0);
   UIView* popupControllerView = [popup_controller_ view];
   CGRect popupControllerFrame = popupControllerView.frame;
   popupControllerFrame.origin = CGPointZero;
   popupControllerView.frame = popupControllerFrame;
   [popupView_ addSubview:popupControllerView];
   if (IsIPadIdiom()) {
     [popupView_ setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
-    base::scoped_nsobject<UIImageView> shadowView([[UIImageView alloc]
-        initWithImage:NativeImage(IDR_IOS_TOOLBAR_SHADOW_FULL_BLEED)]);
+    UIImageView* shadowView = [[UIImageView alloc]
+        initWithImage:NativeImage(IDR_IOS_TOOLBAR_SHADOW_FULL_BLEED)];
     [shadowView setUserInteractionEnabled:NO];
     [shadowView setTranslatesAutoresizingMaskIntoConstraints:NO];
     [popupView_ addSubview:shadowView];
 
     // Add constraints to position |shadowView| at the bottom of |popupView_|
     // with the same width as |popupView_|.
     NSDictionary* views = NSDictionaryOfVariableBindings(shadowView);
     [popupView_
         addConstraints:[NSLayoutConstraint
                            constraintsWithVisualFormat:@"H:|[shadowView]|"
                                                options:0
                                                metrics:nil
                                                  views:views]];
     [popupView_ addConstraint:[NSLayoutConstraint
                                   constraintWithItem:shadowView
                                            attribute:NSLayoutAttributeBottom
                                            relatedBy:NSLayoutRelationEqual
                                               toItem:popupView_
                                            attribute:NSLayoutAttributeBottom
                                           multiplier:1
                                             constant:0]];
   } else {
     // Add a white background to prevent seing the logo scroll through the
     // omnibox.
-    base::scoped_nsobject<UIView> whiteBackground(
-        [[UIView alloc] initWithFrame:CGRectZero]);
+    UIView* whiteBackground = [[UIView alloc] initWithFrame:CGRectZero];
     [popupView_ addSubview:whiteBackground];
     [whiteBackground setBackgroundColor:[UIColor whiteColor]];
 
     // Set constraints to |whiteBackground|.
     [whiteBackground setTranslatesAutoresizingMaskIntoConstraints:NO];
     NSDictionary* metrics = @{ @"height" : @(kWhiteBackgroundHeight) };
     NSDictionary* views = NSDictionaryOfVariableBindings(whiteBackground);
     [popupView_
         addConstraints:[NSLayoutConstraint
                            constraintsWithVisualFormat:@"H:|[whiteBackground]|"
@@ skipping 177 matching lines @@
     UMA_HISTOGRAM_LONG_TIMES_100(
         "MobileOmnibox.PressedClipboardSuggestionAge",
         ClipboardRecentContent::GetInstance()->GetClipboardContentAge());
   }
   edit_view_->OpenMatch(match, disposition, GURL(), base::string16(), row);
 }
 
 bool OmniboxPopupViewIOS::IsOpen() const {
   return is_open_;
 }