[iOS] Use ARC attributes for OverscrollActionView properties.

Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ia3fbf9ce8af09ca056b6dfb890fe533ac9f65fe7
Reviewed-on: https://chromium-review.googlesource.com/1018001Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552098}

ios/chrome/browser/ui/overscroll_actions/overscroll_actions_view.h

@@ -46,7 +46,7 @@ enum class OverscrollStyle {
 // The currently selected action.
 @property(nonatomic, assign, readonly) OverscrollAction selectedAction;
 // The view displayed has the background of the overscroll actions view.
-@property(nonatomic, retain, readonly) UIView* backgroundView;
+@property(nonatomic, strong, readonly) UIView* backgroundView;
 // Whether cropping is set on the selection circle (true by default).
 @property(nonatomic, assign) BOOL selectionCroppingEnabled;
 

ios/chrome/browser/ui/overscroll_actions/overscroll_actions_view.mm

@@ -144,21 +144,21 @@ enum class OverscrollViewState {
 @property(nonatomic, assign, readwrite) OverscrollAction selectedAction;
 
 // Actions image views.
-@property(nonatomic, retain) UIImageView* addTabActionImageView;
-@property(nonatomic, retain) UIImageView* refreshActionImageView;
-@property(nonatomic, retain) UIImageView* closeTabActionImageView;
+@property(nonatomic, strong) UIImageView* addTabActionImageView;
+@property(nonatomic, strong) UIImageView* refreshActionImageView;
+@property(nonatomic, strong) UIImageView* closeTabActionImageView;
 
-@property(nonatomic, retain) CALayer* highlightMaskLayer;
+@property(nonatomic, strong) CALayer* highlightMaskLayer;
 
-@property(nonatomic, retain) UIImageView* addTabActionImageViewHighlighted;
-@property(nonatomic, retain) UIImageView* refreshActionImageViewHighlighted;
-@property(nonatomic, retain) UIImageView* closeTabActionImageViewHighlighted;
+@property(nonatomic, strong) UIImageView* addTabActionImageViewHighlighted;
+@property(nonatomic, strong) UIImageView* refreshActionImageViewHighlighted;
+@property(nonatomic, strong) UIImageView* closeTabActionImageViewHighlighted;
 
 // The layer displaying the selection circle.
-@property(nonatomic, retain) CAShapeLayer* selectionCircleLayer;
+@property(nonatomic, strong) CAShapeLayer* selectionCircleLayer;
 // Mask layer used to display highlighted states when the selection circle is
 // above them.
-@property(nonatomic, retain) CAShapeLayer* selectionCircleMaskLayer;
+@property(nonatomic, strong) CAShapeLayer* selectionCircleMaskLayer;
 
 // The current vertical offset.
 @property(nonatomic, assign) CGFloat verticalOffset;
@@ -167,13 +167,13 @@ enum class OverscrollViewState {
 // The internal state of the OverscrollActionsView.
 @property(nonatomic, assign) OverscrollViewState overscrollState;
 // A shadow image view displayed at the bottom.
-@property(nonatomic, retain) UIImageView* shadowView;
+@property(nonatomic, strong) UIImageView* shadowView;
 // Redefined to readwrite.
-@property(nonatomic, retain, readwrite) UIView* backgroundView;
+@property(nonatomic, strong, readwrite) UIView* backgroundView;
 // Snapshot view added on top of the background image view.
-@property(nonatomic, retain, readwrite) UIView* snapshotView;
+@property(nonatomic, strong, readwrite) UIView* snapshotView;
 // The parent layer on the selection circle used for cropping purpose.
-@property(nonatomic, retain, readwrite) CALayer* selectionCircleCroppingLayer;
+@property(nonatomic, strong, readwrite) CALayer* selectionCircleCroppingLayer;
 
 // An absolute horizontal offset that also takes into account snapping.
 - (CGFloat)absoluteHorizontalOffset;