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

Automatically generated ARCMigrate commit
Notable issues:static_cast changed to __bridge cast.
BUG=624363
TEST=None

Review-Url: https://codereview.chromium.org/2819283004
Cr-Commit-Position: refs/heads/master@{#467946}

ios/chrome/browser/ui/util/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 source_set("util") {
+  configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "CRUILabel+AttributeUtils.h",
     "CRUILabel+AttributeUtils.mm",

ios/chrome/browser/ui/util/CRUILabel+AttributeUtils.mm

@@ -6,10 +6,13 @@
 
 #import <objc/runtime.h>
 
-#import "base/ios/weak_nsobject.h"
-#include "base/mac/scoped_nsobject.h"
+#include "base/logging.h"
 #import "ios/chrome/browser/ui/util/label_observer.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 // They key under which to associate the line height with the label.
 const void* const kLineHeightKey = &kLineHeightKey;
@@ -57,15 +60,14 @@ CGFloat GetAssociatedLineHeight(UILabel* label) {
   if (!self.text.length || !self.attributedText.string.length)
     return;
 
-  base::scoped_nsobject<NSMutableAttributedString> newString(
-      [self.attributedText mutableCopy]);
+  NSMutableAttributedString* newString = [self.attributedText mutableCopy];
   DCHECK([newString length]);
   NSParagraphStyle* style = [newString attribute:NSParagraphStyleAttributeName
                                          atIndex:0
                                   effectiveRange:nullptr];
   if (!style)
     style = [NSParagraphStyle defaultParagraphStyle];
-  base::scoped_nsobject<NSMutableParagraphStyle> newStyle([style mutableCopy]);
+  NSMutableParagraphStyle* newStyle = [style mutableCopy];
   [newStyle setMinimumLineHeight:lineHeight];
   [newStyle setMaximumLineHeight:lineHeight];
   [newString addAttribute:NSParagraphStyleAttributeName

ios/chrome/browser/ui/util/core_text_util.mm

@@ -8,11 +8,14 @@
 
 #include "base/i18n/rtl.h"
 #include "base/mac/foundation_util.h"
-#include "base/mac/scoped_nsobject.h"
 #import "ios/chrome/browser/ui/util/manual_text_framer.h"
 #import "ios/chrome/browser/ui/util/text_frame.h"
 #import "ios/chrome/browser/ui/util/unicode_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace core_text_util {
 
 namespace {
@@ -26,11 +29,11 @@ CFRange GetValidRangeForTextFrame(CTFrameRef text_frame,
   bool is_rtl =
       GetEffectiveWritingDirection(string) == NSWritingDirectionRightToLeft;
   for (id line_id in base::mac::CFToNSCast(CTFrameGetLines(text_frame))) {
-    CTLineRef line = static_cast<CTLineRef>(line_id);
+    CTLineRef line = (__bridge CTLineRef)(line_id);
     NSArray* runs = base::mac::CFToNSCast(CTLineGetGlyphRuns(line));
     NSInteger run_idx = is_rtl ? runs.count - 1 : 0;
     while (run_idx >= 0 && run_idx < static_cast<NSInteger>(runs.count)) {
-      CTRunRef run = static_cast<CTRunRef>(runs[run_idx]);
+      CTRunRef run = (__bridge CTRunRef)(runs[run_idx]);
       CFRange run_range = CTRunGetStringRange(run);
       if (run_range.location == range.location + range.length)
         range.length += run_range.length;

ios/chrome/browser/ui/util/i18n_string.mm

@@ -8,6 +8,10 @@
 #include "base/strings/string16.h"
 #include "base/strings/sys_string_conversions.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 NSString* AdjustStringForLocaleDirection(NSString* text) {
   base::string16 converted_text = base::SysNSStringToUTF16(text);
   bool has_changed =
@@ -15,5 +19,5 @@ NSString* AdjustStringForLocaleDirection(NSString* text) {
   if (has_changed) {
     return base::SysUTF16ToNSString(converted_text);
   }
-  return [[text copy] autorelease];
+  return [text copy];
 }

ios/chrome/browser/ui/util/label_link_controller.h

@@ -35,7 +35,7 @@ class GURL;
 
 // Sets the link color for any defined links, updating the controlled label's
 // attributed text accordingly.
-@property(nonatomic, assign) UIColor* linkColor;
+@property(nonatomic, copy) UIColor* linkColor;
 
 // Sets the link underline style for any defined links, updating the controlled
 // label's attributed text accordingly.
@@ -43,7 +43,7 @@ class GURL;
 
 // Sets the link font for any defined links, updating the controlled label's
 // attributed text accordingly.
-@property(nonatomic, retain) UIFont* linkFont;
+@property(nonatomic, strong) UIFont* linkFont;
 
 // Creates a new controller for |label|, keeping a strong reference. |action| is
 // the block called for any tapped link.

ios/chrome/browser/ui/util/label_observer.mm

@@ -6,11 +6,12 @@
 
 #import <objc/runtime.h>
 
-#import "base/ios/weak_nsobject.h"
-#import "base/mac/scoped_block.h"
-#import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 // The key under which LabelObservers are associated with their labels.
 const void* const kLabelObserverKey = &kLabelObserverKey;
@@ -26,11 +27,11 @@ NSString* GetStringValue(id value) {
 
 @interface LabelObserver () {
   // The label being observed.
-  base::WeakNSObject<UILabel> _label;
+  __weak UILabel* _label;
   // Arrays used to store registered actions.
-  base::scoped_nsobject<NSMutableArray> _styleActions;
-  base::scoped_nsobject<NSMutableArray> _layoutActions;
-  base::scoped_nsobject<NSMutableArray> _textActions;
+  NSMutableArray* _styleActions;
+  NSMutableArray* _layoutActions;
+  NSMutableArray* _textActions;
 }
 
 // Whether or not observer actions are currently being executed.  This is used
@@ -89,7 +90,7 @@ static NSSet* textKeys;
 - (instancetype)initWithLabel:(UILabel*)label {
   if ((self = [super init])) {
     DCHECK(label);
-    _label.reset(label);
+    _label = label;
     [self resetLabelAttributes];
   }
   return self;
@@ -98,7 +99,6 @@ static NSSet* textKeys;
 - (void)dealloc {
   objc_setAssociatedObject(_label, kLabelObserverKey, nil,
                            OBJC_ASSOCIATION_ASSIGN);
-  [super dealloc];
 }
 
 #pragma mark - Public interface
@@ -111,7 +111,6 @@ static NSSet* textKeys;
     observer = [[LabelObserver alloc] initWithLabel:label];
     objc_setAssociatedObject(label, kLabelObserverKey, observer,
                              OBJC_ASSOCIATION_ASSIGN);
-    [observer autorelease];
   }
   return observer;
 }
@@ -136,24 +135,24 @@ static NSSet* textKeys;
 - (void)addStyleChangedAction:(LabelObserverAction)action {
   DCHECK(action);
   if (!_styleActions)
-    _styleActions.reset([[NSMutableArray alloc] init]);
-  base::mac::ScopedBlock<LabelObserverAction> actionCopy([action copy]);
+    _styleActions = [[NSMutableArray alloc] init];
+  LabelObserverAction actionCopy = [action copy];
   [_styleActions addObject:actionCopy];
 }
 
 - (void)addLayoutChangedAction:(LabelObserverAction)action {
   DCHECK(action);
   if (!_layoutActions)
-    _layoutActions.reset([[NSMutableArray alloc] init]);
-  base::mac::ScopedBlock<LabelObserverAction> actionCopy([action copy]);
+    _layoutActions = [[NSMutableArray alloc] init];
+  LabelObserverAction actionCopy = [action copy];
   [_layoutActions addObject:actionCopy];
 }
 
 - (void)addTextChangedAction:(LabelObserverAction)action {
   DCHECK(action);
   if (!_textActions)
-    _textActions.reset([[NSMutableArray alloc] init]);
-  base::mac::ScopedBlock<LabelObserverAction> actionCopy([action copy]);
+    _textActions = [[NSMutableArray alloc] init];
+  LabelObserverAction actionCopy = [action copy];
   [_textActions addObject:actionCopy];
 }
 
@@ -190,8 +189,8 @@ static NSSet* textKeys;
       [NSMutableDictionary dictionaryWithCapacity:styleKeys.count];
   for (NSString* property in styleKeys)
     labelStyle[property] = [_label valueForKey:property];
-  base::scoped_nsobject<NSAttributedString> attributedText(
-      [[NSAttributedString alloc] initWithString:[_label text]]);
+  NSAttributedString* attributedText =
+      [[NSAttributedString alloc] initWithString:[_label text]];
   [_label setAttributedText:attributedText];
   for (NSString* property in styleKeys)
     [_label setValue:labelStyle[property] forKey:property];
@@ -204,7 +203,7 @@ static NSSet* textKeys;
   if (self.respondingToKVO)
     return;
   self.respondingToKVO = YES;
-  DCHECK_EQ(object, _label.get());
+  DCHECK_EQ(object, _label);
   if ([styleKeys containsObject:key]) {
     [self performActions:_styleActions];
   } else if ([layoutKeys containsObject:key]) {

ios/chrome/browser/ui/util/manual_text_framer.h

@@ -29,7 +29,7 @@
 
 // The TextFrame created by |-frameText|.  Will be nil before |-frameText| is
 // called.
-@property(nonatomic, readonly) id<TextFrame> textFrame;
+@property(strong, nonatomic, readonly) id<TextFrame> textFrame;
 
 @end
 

ios/chrome/browser/ui/util/manual_text_framer.mm

@@ -9,11 +9,14 @@
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
-#include "base/mac/scoped_nsobject.h"
 #import "ios/chrome/browser/ui/util/core_text_util.h"
 #import "ios/chrome/browser/ui/util/text_frame.h"
 #import "ios/chrome/browser/ui/util/unicode_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 // NOTE: When RTL text is laid out into glyph runs, the glyphs appear in the
 // visual order in which they appear on screen.  In other words, the glyphs are
 // arranged in the reverse order of their corresponding characters in the
@@ -70,8 +73,8 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 // A TextFrame implementation that is manually created by ManualTextFramer.
 @interface ManualTextFrame : NSObject<TextFrame> {
   // Backing objects for properties of the same name.
-  base::scoped_nsobject<NSAttributedString> _string;
-  base::scoped_nsobject<NSMutableArray> _lines;
+  NSAttributedString* _string;
+  NSMutableArray* _lines;
 }
 
 // Designated initializer.
@@ -99,9 +102,9 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
                       inBounds:(CGRect)bounds {
   if ((self = [super init])) {
     DCHECK(string.string.length);
-    _string.reset([string retain]);
+    _string = string;
     _bounds = bounds;
-    _lines.reset([[NSMutableArray alloc] init]);
+    _lines = [[NSMutableArray alloc] init];
   }
   return self;
 }
@@ -109,11 +112,11 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 #pragma mark Accessors
 
 - (NSAttributedString*)string {
-  return _string.get();
+  return _string;
 }
 
 - (NSArray*)lines {
-  return _lines.get();
+  return _lines;
 }
 
 #pragma mark Private
@@ -121,10 +124,9 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 - (void)addFramedLineWithLine:(CTLineRef)line
                   stringRange:(NSRange)stringRange
                        origin:(CGPoint)origin {
-  base::scoped_nsobject<FramedLine> framedLine([[FramedLine alloc]
-      initWithLine:line
-       stringRange:stringRange
-            origin:origin]);
+  FramedLine* framedLine = [[FramedLine alloc] initWithLine:line
+                                                stringRange:stringRange
+                                                     origin:origin];
   [_lines addObject:framedLine];
 }
 
@@ -132,14 +134,10 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 
 #pragma mark - ManualTextFramer Private Interface
 
-@interface ManualTextFramer () {
-  // Backing objects for properties of the same name.
-  base::scoped_nsobject<NSAttributedString> _string;
-  base::scoped_nsobject<ManualTextFrame> _manualTextFrame;
-}
+@interface ManualTextFramer ()
 
 // The string passed upon initialization.
-@property(nonatomic, readonly) NSAttributedString* string;
+@property(strong, nonatomic, readonly) NSAttributedString* string;
 
 // The bounds passed upon initialization.
 @property(nonatomic, readonly) CGRect bounds;
@@ -151,7 +149,7 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 @property(nonatomic, assign) CGFloat remainingHeight;
 
 // The text frame constructed by |-frameText|.
-@property(nonatomic, readonly) ManualTextFrame* manualTextFrame;
+@property(strong, nonatomic, readonly) ManualTextFrame* manualTextFrame;
 
 // Creates a ManualTextFrame and assigns it to |_manualTextFrame|.  Returns YES
 // if a new text frame was successfully created.
@@ -167,7 +165,6 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 @interface ParagraphFramer : ManualTextFramer {
   // Backing objects for properties of the same name.
   base::ScopedCFTypeRef<CTLineRef> _line;
-  base::scoped_nsobject<NSCharacterSet> _lineEndSet;
 }
 
 // The CTLine created from |string|.
@@ -179,7 +176,7 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 // Character set containing characters that are appropriate for line endings.
 // These characters include whitespaces and newlines (denoting a word boundary),
 // in addition to line-ending characters like hyphens, em dashes, and en dashes.
-@property(nonatomic, readonly) NSCharacterSet* lineEndSet;
+@property(strong, nonatomic, readonly) NSCharacterSet* lineEndSet;
 
 // The index of the current run that is being framed.  Setting |runIdx| also
 // updates |currentRun| and |currentGlyphCount|.
@@ -271,6 +268,7 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 @synthesize currentLineWidth = _currentLineWidth;
 @synthesize currentWhitespaceWidth = _currentWhitespaceWidth;
 @synthesize isRTL = _isRTL;
+@synthesize lineEndSet = _lineEndSet;
 
 - (instancetype)initWithString:(NSAttributedString*)string
                       inBounds:(CGRect)bounds {
@@ -343,7 +341,7 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
     NSMutableCharacterSet* lineEndSet =
         [NSMutableCharacterSet whitespaceAndNewlineCharacterSet];
     [lineEndSet addCharactersInString:@"-\u2013\u2014"];
-    _lineEndSet.reset([lineEndSet retain]);
+    _lineEndSet = lineEndSet;
   }
   return _lineEndSet;
 }
@@ -353,7 +351,7 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
   self.framedGlyphCount = 0;
   if ([self runIdxIsValid:runIdx]) {
     NSArray* runs = base::mac::CFToNSCast(CTLineGetGlyphRuns(self.line));
-    _currentRun = static_cast<CTRunRef>(runs[_runIdx]);
+    _currentRun = (__bridge CTRunRef)(runs[_runIdx]);
     _currentGlyphCount = CTRunGetGlyphCount(self.currentRun);
   } else {
     _currentRun = nullptr;
@@ -562,12 +560,14 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 @synthesize bounds = _bounds;
 @synthesize boundingWidth = _boundingWidth;
 @synthesize remainingHeight = _remainingHeight;
+@synthesize string = _string;
+@synthesize manualTextFrame = _manualTextFrame;
 
 - (instancetype)initWithString:(NSAttributedString*)string
                       inBounds:(CGRect)bounds {
   if ((self = [super init])) {
     DCHECK(string.string.length);
-    _string.reset([string retain]);
+    _string = string;
     _bounds = bounds;
     _boundingWidth = CGRectGetWidth(bounds);
     _remainingHeight = CGRectGetHeight(bounds);
@@ -586,9 +586,9 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
     // variables for the top-level ManualTextFramer.
     CGRect remainingBounds =
         CGRectMake(0, 0, self.boundingWidth, self.remainingHeight);
-    base::scoped_nsobject<ParagraphFramer> framer([[ParagraphFramer alloc]
-        initWithString:paragraph
-              inBounds:remainingBounds]);
+    ParagraphFramer* framer =
+        [[ParagraphFramer alloc] initWithString:paragraph
+                                       inBounds:remainingBounds];
     [framer frameText];
     id<TextFrame> frame = [framer textFrame];
     DCHECK(frame);
@@ -611,16 +611,8 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 
 #pragma mark Accessors
 
-- (NSAttributedString*)string {
-  return _string.get();
-}
-
-- (ManualTextFrame*)manualTextFrame {
-  return _manualTextFrame.get();
-}
-
 - (id<TextFrame>)textFrame {
-  return _manualTextFrame.get();
+  return _manualTextFrame;
 }
 
 #pragma mark Private
@@ -628,8 +620,8 @@ NSArray* GetParagraphStringsForString(NSAttributedString* string) {
 - (BOOL)setupManualTextFrame {
   if (_manualTextFrame)
     return NO;
-  _manualTextFrame.reset([[ManualTextFrame alloc] initWithString:self.string
-                                                        inBounds:self.bounds]);
+  _manualTextFrame =
+      [[ManualTextFrame alloc] initWithString:self.string inBounds:self.bounds];
   return YES;
 }
 

ios/chrome/browser/ui/util/pasteboard_util.mm

@@ -11,6 +11,10 @@
 #import "net/base/mac/url_conversions.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 void StoreURLInPasteboard(const GURL& URL) {
   DCHECK(URL.is_valid());
   NSData* plainText = [base::SysUTF8ToNSString(URL.spec())

ios/chrome/browser/ui/util/snapshot_util.mm

@@ -4,6 +4,10 @@
 
 #import "ios/chrome/browser/ui/util/snapshot_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace snapshot_util {
 
 UIView* GenerateSnapshot(UIView* view) {
@@ -16,7 +20,7 @@ UIView* GenerateSnapshot(UIView* view) {
     [view.layer renderInContext:UIGraphicsGetCurrentContext()];
     UIImage* screenshot = UIGraphicsGetImageFromCurrentImageContext();
     UIGraphicsEndImageContext();
-    snapshot = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
+    snapshot = [[UIView alloc] initWithFrame:CGRectZero];
     snapshot.layer.contents = static_cast<id>(screenshot.CGImage);
   }
   return snapshot;

ios/chrome/browser/ui/util/text_frame.mm

@@ -6,13 +6,16 @@
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
-#import "base/mac/scoped_nsobject.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
 
 #pragma mark - FramedLine
 
 @implementation FramedLine {
   // Backing object for property of the same name.
-  base::scoped_nsprotocol<id> _line;
+  id _line;
 }
 
 @synthesize stringRange = _stringRange;
@@ -27,11 +30,10 @@
     // locations, but its length should be equal to |stringRange|.
     NSRange lineRange;
     if (!base::mac::CFRangeToNSRange(CTLineGetStringRange(line), &lineRange)) {
-      [self release];
       return nil;
     }
     DCHECK_EQ(lineRange.length, stringRange.length);
-    _line.reset([static_cast<id>(line) retain]);
+    _line = (__bridge id)(line);
     _stringRange = stringRange;
     _origin = origin;
   }
@@ -40,7 +42,7 @@
 
 - (NSString*)description {
   return [NSString stringWithFormat:@"%@ line:%@, stringRange:%@, origin:%@",
-                                    [super description], _line.get(),
+                                    [super description], _line,
                                     NSStringFromRange(_stringRange),
                                     NSStringFromCGPoint(_origin)];
 }
@@ -59,7 +61,7 @@
 #pragma mark Accessors
 
 - (CTLineRef)line {
-  return static_cast<CTLineRef>(_line.get());
+  return (__bridge CTLineRef)(_line);
 }
 
 @end
@@ -68,9 +70,9 @@
 
 @interface CoreTextTextFrame () {
   // Backing object for property of the same name.
-  base::scoped_nsobject<NSAttributedString> _string;
-  base::scoped_nsprotocol<id> _frame;
-  base::scoped_nsobject<NSMutableArray> _lines;
+  NSAttributedString* _string;
+  id _frame;
+  NSMutableArray* _lines;
 }
 
 // The CTFrameRef passed on initializaton.
@@ -90,10 +92,10 @@
                          frame:(CTFrameRef)frame {
   if ((self = [super self])) {
     DCHECK(string.string.length);
-    _string.reset([string retain]);
+    _string = string;
     _bounds = bounds;
     DCHECK(frame);
-    _frame.reset([static_cast<id>(frame) retain]);
+    _frame = (__bridge id)(frame);
   }
   return self;
 }
@@ -101,7 +103,7 @@
 #pragma mark Accessors
 
 - (NSAttributedString*)string {
-  return _string.get();
+  return _string;
 }
 
 - (NSRange)framedRange {
@@ -115,11 +117,11 @@
 - (NSArray*)lines {
   if (!_lines)
     [self createFramedLines];
-  return _lines.get();
+  return _lines;
 }
 
 - (CTFrameRef)frame {
-  return static_cast<CTFrameRef>(_frame.get());
+  return (__bridge CTFrameRef)(_frame);
 }
 
 #pragma mark Private
@@ -128,17 +130,17 @@
   NSArray* lines = base::mac::CFToNSCast(CTFrameGetLines(self.frame));
   CGPoint origins[lines.count];
   CTFrameGetLineOrigins(self.frame, CFRangeMake(0, 0), origins);
-  _lines.reset([[NSMutableArray alloc] initWithCapacity:lines.count]);
+  _lines = [[NSMutableArray alloc] initWithCapacity:lines.count];
   for (NSUInteger line_idx = 0; line_idx < lines.count; ++line_idx) {
-    CTLineRef line = static_cast<CTLineRef>(lines[line_idx]);
+    CTLineRef line = (__bridge CTLineRef)(lines[line_idx]);
     NSRange stringRange;
     CFRange cfStringRange = CTLineGetStringRange(line);
     if (!base::mac::CFRangeToNSRange(cfStringRange, &stringRange))
       break;
-    base::scoped_nsobject<FramedLine> framedLine([[FramedLine alloc]
-        initWithLine:line
-         stringRange:stringRange
-              origin:origins[line_idx]]);
+    FramedLine* framedLine =
+        [[FramedLine alloc] initWithLine:line
+                             stringRange:stringRange
+                                  origin:origins[line_idx]];
     [_lines addObject:framedLine];
   }
 }

ios/chrome/browser/ui/util/text_region_mapper.mm

@@ -11,38 +11,41 @@
 #include "base/ios/ios_util.h"
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
-#include "base/mac/scoped_nsobject.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/util/core_text_util.h"
 #import "ios/chrome/browser/ui/util/manual_text_framer.h"
 #import "ios/chrome/browser/ui/util/text_frame.h"
 
-@interface CoreTextRegionMapper () {
-  // Backing object for property of the same name.
-  base::scoped_nsprotocol<id<TextFrame>> _textFrame;
-}
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@interface CoreTextRegionMapper ()
 
 // The TextFrame used to calculate rects.
-@property(nonatomic, readonly) id<TextFrame> textFrame;
+@property(strong, nonatomic, readonly) id<TextFrame> textFrame;
 
 @end
 
 @implementation CoreTextRegionMapper
+
+@synthesize textFrame = _textFrame;
+
 - (instancetype)initWithAttributedString:(NSAttributedString*)string
                                   bounds:(CGRect)bounds {
   if ((self = [super init])) {
     base::ScopedCFTypeRef<CTFrameRef> ctFrame =
         core_text_util::CreateTextFrameForStringInBounds(string, bounds);
-    base::scoped_nsobject<ManualTextFramer> framer(
-        [[ManualTextFramer alloc] initWithString:string inBounds:bounds]);
+    ManualTextFramer* framer =
+        [[ManualTextFramer alloc] initWithString:string inBounds:bounds];
     [framer frameText];
     if (core_text_util::IsTextFrameValid(ctFrame, framer, string)) {
-      _textFrame.reset([[CoreTextTextFrame alloc] initWithString:string
-                                                          bounds:bounds
-                                                           frame:ctFrame]);
+      _textFrame = [[CoreTextTextFrame alloc] initWithString:string
+                                                      bounds:bounds
+                                                       frame:ctFrame];
     } else {
       // Use ManualTextFramer if |ctFrame| is invalid.
-      _textFrame.reset([[framer textFrame] retain]);
+      _textFrame = [framer textFrame];
     }
     DCHECK(self.textFrame);
   }
@@ -54,10 +57,6 @@
   return nil;
 }
 
-- (id<TextFrame>)textFrame {
-  return _textFrame.get();
-}
-
 - (NSArray*)rectsForRange:(NSRange)range {
   NSRange framedRange = self.textFrame.framedRange;
   if (!range.length || range.location + range.length > framedRange.length)

ios/chrome/browser/ui/util/top_view_controller.mm

@@ -4,6 +4,10 @@
 
 #import "ios/chrome/browser/ui/util/top_view_controller.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace top_view_controller {
 
 UIViewController* TopPresentedViewController() {

ios/chrome/browser/ui/util/transparent_link_button.mm

@@ -5,12 +5,14 @@
 #import "ios/chrome/browser/ui/util/transparent_link_button.h"
 
 #include "base/ios/ios_util.h"
-#import "base/ios/weak_nsobject.h"
 #import "base/logging.h"
-#import "base/mac/scoped_nsobject.h"
 #import "base/strings/sys_string_conversions.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 // Minimum tap area dimension, as specified by Apple guidelines.
 const CGFloat kLinkTapAreaMinimum = 44.0;
 
@@ -21,19 +23,14 @@ const CGFloat kHighlightViewCornerRadius = 2.0;
 const CGFloat kHighlightViewBackgroundAlpha = 0.25;
 }
 
-@interface TransparentLinkButton () {
-  // Backing objects for properties of the same name.
-  base::scoped_nsobject<UIView> _highlightView;
-  base::WeakNSObject<TransparentLinkButton> _previousLinkButton;
-  base::WeakNSObject<TransparentLinkButton> _nextLinkButton;
-}
+@interface TransparentLinkButton ()
 
 // The link frame passed upon initialization.
 @property(nonatomic, readonly) CGRect linkFrame;
 
 // Semi-transparent overlay that is shown to highlight the link text when the
 // button's highlight state is set to YES.
-@property(nonatomic, readonly) UIView* highlightView;
+@property(nonatomic, strong, readonly) UIView* highlightView;
 
 // Links that span multiple lines require more than one TransparentLinkButton.
 // These properties are used to populate the highlight state from one button to
@@ -65,6 +62,9 @@ const CGFloat kHighlightViewBackgroundAlpha = 0.25;
 @synthesize URL = _URL;
 @synthesize debug = _debug;
 @synthesize linkFrame = _linkFrame;
+@synthesize highlightView = _highlightView;
+@synthesize previousLinkButton = _previousLinkButton;
+@synthesize nextLinkButton = _nextLinkButton;
 
 - (instancetype)initWithLinkFrame:(CGRect)linkFrame URL:(const GURL&)URL {
   CGFloat linkHeightExpansion =
@@ -91,22 +91,6 @@ const CGFloat kHighlightViewBackgroundAlpha = 0.25;
 
 #pragma mark - Accessors
 
-- (void)setPreviousLinkButton:(TransparentLinkButton*)previousLinkButton {
-  _previousLinkButton.reset(previousLinkButton);
-}
-
-- (TransparentLinkButton*)previousLinkButton {
-  return _previousLinkButton.get();
-}
-
-- (void)setNextLinkButton:(TransparentLinkButton*)nextLinkButton {
-  _nextLinkButton.reset(nextLinkButton);
-}
-
-- (TransparentLinkButton*)nextLinkButton {
-  return _nextLinkButton.get();
-}
-
 - (void)setDebug:(BOOL)debug {
   _debug = debug;
   self.layer.borderWidth = _debug ? 1.0 : 0.0;
@@ -121,7 +105,7 @@ const CGFloat kHighlightViewBackgroundAlpha = 0.25;
     CGRect linkFrame =
         [self convertRect:self.linkFrame fromView:self.superview];
     linkFrame = CGRectInset(linkFrame, -kHighlightViewCornerRadius, 0);
-    _highlightView.reset([[UIView alloc] initWithFrame:linkFrame]);
+    _highlightView = [[UIView alloc] initWithFrame:linkFrame];
     [_highlightView
         setBackgroundColor:[UIColor
                                colorWithWhite:0.0
@@ -130,7 +114,7 @@ const CGFloat kHighlightViewBackgroundAlpha = 0.25;
     [_highlightView setClipsToBounds:YES];
     [self addSubview:_highlightView];
   }
-  return _highlightView.get();
+  return _highlightView;
 }
 
 - (void)setHighlighted:(BOOL)highlighted {
@@ -148,12 +132,12 @@ const CGFloat kHighlightViewBackgroundAlpha = 0.25;
               accessibilityLabel:(NSString*)label {
   if (!linkFrames.count)
     return @[];
-  base::scoped_nsobject<NSMutableArray> buttons(
-      [[NSMutableArray alloc] initWithCapacity:linkFrames.count]);
+  NSMutableArray* buttons =
+      [[NSMutableArray alloc] initWithCapacity:linkFrames.count];
   for (NSValue* linkFrameValue in linkFrames) {
     CGRect linkFrame = [linkFrameValue CGRectValue];
-    base::scoped_nsobject<TransparentLinkButton> button(
-        [[TransparentLinkButton alloc] initWithLinkFrame:linkFrame URL:URL]);
+    TransparentLinkButton* button =
+        [[TransparentLinkButton alloc] initWithLinkFrame:linkFrame URL:URL];
     TransparentLinkButton* previousButton = [buttons lastObject];
     previousButton.nextLinkButton = button;
     [button setPreviousLinkButton:previousButton];

ios/chrome/browser/ui/util/unicode_util.mm

@@ -6,6 +6,10 @@
 
 #include "base/logging.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace unicode_util {
 namespace {
 // Character ranges for characters with R or AL bidirectionality.