[ObjC ARC] Converts ios/chrome/browser/ui/ntp:ntp_internal to ARC.

ios/chrome/browser/ui/ntp/new_tab_page_bar.mm

 // Copyright 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.
 
 #import "ios/chrome/browser/ui/ntp/new_tab_page_bar.h"
 
 #import <QuartzCore/QuartzCore.h>
 #include <cmath>
 
 #include "base/logging.h"
-#include "base/mac/objc_property_releaser.h"
-#include "base/mac/scoped_nsobject.h"
+
 #import "ios/chrome/browser/ui/bookmarks/bookmark_utils_ios.h"
 #import "ios/chrome/browser/ui/ntp/new_tab_page_bar_button.h"
 #import "ios/chrome/browser/ui/ntp/new_tab_page_bar_item.h"
 #import "ios/chrome/browser/ui/rtl_geometry.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #import "ui/gfx/ios/NSString+CrStringDrawing.h"
 #include "ui/gfx/scoped_ui_graphics_push_context_ios.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 const CGFloat kBarHeight = 48.0f;
 
 const CGFloat kRegularLayoutButtonWidth = 168;
 
 const int kOverlayViewColor = 0x5A7EF5;
 const int kOverlayColorWidth = 98;
 const int kNumberOfTabsIncognito = 2;
 
 }  // anonymous namespace
 
 @interface NewTabPageBar () {
-  base::scoped_nsobject<UIImageView> shadow_;
+  UIImageView* shadow_;
 }
 
-@property(nonatomic, readwrite, retain) NSArray* buttons;
-@property(nonatomic, readwrite, retain) UIButton* popupButton;
+@property(nonatomic, readwrite, strong) NSArray* buttons;
+@property(nonatomic, readwrite, strong) UIButton* popupButton;
 
 - (void)setup;
 - (void)calculateButtonWidth;
 - (void)setupButton:(UIButton*)button;
 - (BOOL)useIconsInButtons;
 - (BOOL)showOverlay;
 @end
 
 @implementation NewTabPageBar {
-  // Tabbar buttons.
-  NSArray* buttons_;  // UIButton
-  NSArray* items_;    // NewTabPageBarItem
   // Which button is currently selected.
   NSUInteger selectedIndex_;
-  // Popup button helper, for iPhone labels.
-  UIButton* popupButton_;
   // Don't allow tabbar animations on startup, only after first tap.
   BOOL canAnimate_;
-  id<NewTabPageBarDelegate> delegate_;  // weak
+  __weak id<NewTabPageBarDelegate> delegate_;
   // Logo view, used to center the tab buttons.
-  base::scoped_nsobject<UIImageView> logoView_;
+  UIImageView* logoView_;
   // Overlay view, used to highlight the selected button.
-  base::scoped_nsobject<UIImageView> overlayView_;
+  UIImageView* overlayView_;
   // Overlay view, used to highlight the selected button.
-  base::scoped_nsobject<UIView> overlayColorView_;
+  UIView* overlayColorView_;
   // Width of a button.
   CGFloat buttonWidth_;
   // Percentage overlay sits over tab bar buttons.
   CGFloat overlayPercentage_;
-
-  base::mac::ObjCPropertyReleaser propertyReleaser_NewTabPageBar_;
 }
 
 @synthesize items = items_;
 @synthesize selectedIndex = selectedIndex_;
 @synthesize popupButton = popupButton_;
 @synthesize buttons = buttons_;
 @synthesize delegate = delegate_;
 @synthesize overlayPercentage = overlayPercentage_;
 
 - (id)initWithFrame:(CGRect)frame {
   self = [super initWithFrame:frame];
   if (self) {
     [self setup];
   }
   return self;
 }
 
 - (id)initWithCoder:(NSCoder*)aDecoder {
   self = [super initWithCoder:aDecoder];
   if (self) {
     [self setup];
   }
   return self;
 }
 
 - (void)setup {
-  propertyReleaser_NewTabPageBar_.Init(self, [NewTabPageBar class]);
   self.selectedIndex = NSNotFound;
   canAnimate_ = NO;
   self.autoresizingMask =
       UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin;
   self.autoresizesSubviews = YES;
   self.backgroundColor = [UIColor clearColor];
 
   if ([self showOverlay]) {
-    overlayView_.reset(
-        [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, buttonWidth_, 2)]);
+    overlayView_ =
+        [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, buttonWidth_, 2)];
 
     // Center |overlayColorView_| inside |overlayView_|.
     CGFloat colorX = AlignValueToPixel((buttonWidth_ - kOverlayColorWidth) / 2);
-    overlayColorView_.reset([[UIView alloc]
-        initWithFrame:CGRectMake(colorX, 0, kOverlayColorWidth, 2)]);
+    overlayColorView_ = [[UIView alloc]
+        initWithFrame:CGRectMake(colorX, 0, kOverlayColorWidth, 2)];
     [overlayColorView_
         setBackgroundColor:UIColorFromRGB(kOverlayViewColor, 1.0)];
     [overlayColorView_ layer].cornerRadius = 1.0;
     [overlayColorView_
         setAutoresizingMask:UIViewAutoresizingFlexibleLeftMargin |
                             UIViewAutoresizingFlexibleRightMargin];
     [overlayView_ addSubview:overlayColorView_];
     [self addSubview:overlayView_];
   }
 
   // Make the drop shadow.
   UIImage* shadowImage = [UIImage imageNamed:@"ntp_bottom_bar_shadow"];
-  shadow_.reset([[UIImageView alloc] initWithImage:shadowImage]);
+  shadow_ = [[UIImageView alloc] initWithImage:shadowImage];
   // Shadow is positioned directly above the new tab page bar.
   [shadow_
       setFrame:CGRectMake(0, -shadowImage.size.height, self.bounds.size.width,
                           shadowImage.size.height)];
   [shadow_ setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
   [self addSubview:shadow_];
 
   self.contentMode = UIViewContentModeRedraw;
 }
 
 - (void)layoutSubviews {
   [super layoutSubviews];
 
   // |buttonWidth_| changes with the screen orientation when the NTP button bar
   // is enabled.
   [self calculateButtonWidth];
 
-  CGFloat logoWidth = logoView_.get().image.size.width;
+  CGFloat logoWidth = logoView_.image.size.width;
   CGFloat padding = [self useIconsInButtons] ? logoWidth : 0;
   CGFloat buttonPadding = floor((CGRectGetWidth(self.bounds) - padding -
                                  buttonWidth_ * self.buttons.count) /
                                     2 +
                                 padding);
 
   for (NSUInteger i = 0; i < self.buttons.count; ++i) {
     NewTabPageBarButton* button = [self.buttons objectAtIndex:i];
     LayoutRect layout = LayoutRectMake(
         buttonPadding + (i * buttonWidth_), CGRectGetWidth(self.bounds), 0,
@@ skipping 32 matching lines @@
 
   buttonWidth_ = kRegularLayoutButtonWidth;
 }
 
 // When setting a new set of items on the tab bar, the buttons need to be
 // regenerated and the old buttons need to be removed.
 - (void)setItems:(NSArray*)newItems {
   if (newItems == items_)
     return;
 
-  [items_ autorelease];
-  items_ = [newItems retain];
+  items_ = newItems;
   // Remove all the existing buttons from the view.
   for (UIButton* button in self.buttons) {
     [button removeFromSuperview];
   }
 
   // Create a set of new buttons.
   [self calculateButtonWidth];
   if (newItems.count) {
     NSMutableArray* newButtons = [NSMutableArray array];
     for (NSUInteger i = 0; i < newItems.count; ++i) {
@@ skipping 114 matching lines @@
   return !IsIPadIdiom() || IsCompactTablet();
 }
 
 - (BOOL)showOverlay {
   // The bar buttons launch modal dialogs on tap on iPhone. Don't show overlay
   // in this case.
   return IsIPadIdiom();
 }
 
 @end