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

ios/chrome/browser/ui/history/favicon_view_provider.mm

Index: ios/chrome/browser/ui/history/favicon_view_provider.mm
diff --git a/ios/chrome/browser/ui/history/favicon_view_provider.mm b/ios/chrome/browser/ui/history/favicon_view_provider.mm
index ea2707e9dc595e037eb94c733d0e08dfde6520f1..d96e12664420f080410ef6cbf1e084b208985fc9 100644
--- a/ios/chrome/browser/ui/history/favicon_view_provider.mm
+++ b/ios/chrome/browser/ui/history/favicon_view_provider.mm
@@ -8,7 +8,6 @@
 #include "base/ios/weak_nsobject.h"
 #include "base/mac/bind_objc_block.h"
 #import "base/mac/foundation_util.h"
-#include "base/mac/objc_property_releaser.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/sys_string_conversions.h"
@@ -24,9 +23,11 @@
 #include "skia/ext/skia_utils_ios.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 @interface FaviconViewProvider () {
-  // Property releaser for FaviconViewProvider.
-  base::mac::ObjCPropertyReleaser _propertyReleaser_FaviconViewProvider;
   // Delegate for handling completion of favicon load.
   base::WeakNSProtocol<id<FaviconViewProviderDelegate>> _delegate;
   // Used to cancel tasks for the LargeIconService.
@@ -38,16 +39,16 @@
 // Size to render the favicon.
 @property(nonatomic, assign) CGFloat faviconSize;
 // Favicon image for the favicon view.
-@property(nonatomic, retain) UIImage* favicon;
+@property(nonatomic, strong) UIImage* favicon;
 // Fallback text for the favicon view if there is no appropriately sized
 // favicon availabile.
 @property(nonatomic, copy) NSString* fallbackText;
 // Fallback background color for the favicon view if there is no appropriately
 // sized favicon available.
-@property(nonatomic, retain) UIColor* fallbackBackgroundColor;
+@property(nonatomic, strong) UIColor* fallbackBackgroundColor;
 // Fallback text color for the favicon view if there is no appropriately
 // sized favicon available.
-@property(nonatomic, retain) UIColor* fallbackTextColor;
+@property(nonatomic, strong) UIColor* fallbackTextColor;
 
 // Fetches favicon for |URL| from |faviconService|. Notifies delegate when
 // favicon is retrieved.
@@ -73,12 +74,10 @@
                    delegate:(id<FaviconViewProviderDelegate>)delegate {
   self = [super init];
   if (self) {
-    _propertyReleaser_FaviconViewProvider.Init(self,
-                                               [FaviconViewProvider class]);
     _faviconSize = faviconSize;
     _delegate.reset(delegate);
-    _fallbackBackgroundColor = [[UIColor grayColor] retain];
-    _fallbackTextColor = [[UIColor whiteColor] retain];
+    _fallbackBackgroundColor = [UIColor grayColor];
+    _fallbackTextColor = [UIColor whiteColor];
     [self fetchFaviconForURL:URL
                         size:faviconSize
                      minSize:minFaviconSize
@@ -102,7 +101,7 @@
   GURL blockURL(URL);
   void (^faviconBlock)(const favicon_base::LargeIconResult&) = ^(
       const favicon_base::LargeIconResult& result) {
-    base::scoped_nsobject<FaviconViewProvider> strongSelf([weakSelf retain]);
+    base::scoped_nsobject<FaviconViewProvider> strongSelf(weakSelf);
     if (!strongSelf)
       return;
     if (result.bitmap.is_valid()) {
@@ -129,7 +128,7 @@
   CGFloat faviconSize = [UIScreen mainScreen].scale * size;
   CGFloat minFaviconSize = [UIScreen mainScreen].scale * minSize;
   largeIconService->GetLargeIconOrFallbackStyle(
-      URL, minFaviconSize, faviconSize, base::BindBlock(faviconBlock),
+      URL, minFaviconSize, faviconSize, base::BindBlockArc(faviconBlock),
       &_faviconTaskTracker);
 }