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

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

Index: ios/chrome/browser/ui/omnibox/truncating_attributed_label.mm
diff --git a/ios/chrome/browser/ui/omnibox/truncating_attributed_label.mm b/ios/chrome/browser/ui/omnibox/truncating_attributed_label.mm
index c4a13e49895e5c9e4f4fb2d622700fc8b1bbc867..b5e91ed6994e551ae510cf18a30717e857ff3456 100644
--- a/ios/chrome/browser/ui/omnibox/truncating_attributed_label.mm
+++ b/ios/chrome/browser/ui/omnibox/truncating_attributed_label.mm
@@ -6,9 +6,12 @@
 
 #include <algorithm>
 
-#include "base/mac/objc_property_releaser.h"
 #include "base/mac/scoped_cftyperef.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface OmniboxPopupTruncatingLabel ()
 - (void)setup;
 - (UIImage*)getLinearGradient:(CGRect)rect;
@@ -16,11 +19,9 @@
 
 @implementation OmniboxPopupTruncatingLabel {
   // Attributed text.
-  base::scoped_nsobject<CATextLayer> textLayer_;
+  CATextLayer* textLayer_;
   // Gradient used to create fade effect. Changes based on view.frame size.
-  base::scoped_nsobject<UIImage> gradient_;
-
-  base::mac::ObjCPropertyReleaser propertyReleaser_OmniboxPopupTruncatingLabel_;
+  UIImage* gradient_;
 }
 
 @synthesize truncateMode = truncateMode_;
@@ -35,9 +36,9 @@
   truncateMode_ = OmniboxPopupTruncatingTail;
 
   // Disable animations in CATextLayer.
-  textLayer_.reset([[CATextLayer layer] retain]);
-  base::scoped_nsobject<NSDictionary> actions([[NSDictionary alloc]
-      initWithObjectsAndKeys:[NSNull null], @"contents", nil]);
+  textLayer_ = [CATextLayer layer];
+  NSDictionary* actions = [[NSDictionary alloc]
+      initWithObjectsAndKeys:[NSNull null], @"contents", nil];
   [textLayer_ setActions:actions];
   [textLayer_ setFrame:self.bounds];
   [textLayer_ setContentsScale:[[UIScreen mainScreen] scale]];
@@ -46,8 +47,6 @@
 - (id)initWithFrame:(CGRect)frame {
   self = [super initWithFrame:frame];
   if (self) {
-    propertyReleaser_OmniboxPopupTruncatingLabel_.Init(
-        self, [OmniboxPopupTruncatingLabel class]);
     [self setup];
   }
   return self;
@@ -64,9 +63,9 @@
 
   // Cache the fade gradient when the frame changes.
   if (!CGRectIsEmpty(frame) &&
-      (!gradient_.get() || !CGSizeEqualToSize([gradient_ size], frame.size))) {
+      (!gradient_ || !CGSizeEqualToSize([gradient_ size], frame.size))) {
     CGRect rect = CGRectMake(0, 0, frame.size.width, frame.size.height);
-    gradient_.reset([[self getLinearGradient:rect] retain]);
+    gradient_ = [self getLinearGradient:rect];
   }
 }
 
@@ -97,7 +96,7 @@
     NOTREACHED();
   }
   if (textAlignment != textAlignment_)
-    gradient_.reset();
+    gradient_ = nil;
   textAlignment_ = textAlignment;
 }