Use UIAlertController on iOS8 for Context Menu.

ui/base/ios/cru_context_menu_controller.h

Index: ui/base/ios/cru_context_menu_controller.h
diff --git a/ui/base/ios/cru_context_menu_controller.h b/ui/base/ios/cru_context_menu_controller.h
index 66fdf9d86c1b7467adb6dfc1a53900e84345a0d0..cb966fa00cdeb5618a884ed969e6cab36776040f 100644
--- a/ui/base/ios/cru_context_menu_controller.h
+++ b/ui/base/ios/cru_context_menu_controller.h
@@ -11,8 +11,11 @@
 // Abstracts displaying context menus for all device form factors, given a
 // CRUContextMenuHolder with the title and action to associate to each menu
 // item. Will show a sheet on the phone and use a popover on a tablet.
-@interface CRUContextMenuController : NSObject<UIActionSheetDelegate,
-                                               UIPopoverControllerDelegate>
+@interface CRUContextMenuController : NSObject
+
+// Whether the context menu is visible.
+@property(nonatomic, readonly, getter=isVisible) BOOL visible;
+
 // Displays a context menu. If on a tablet, |localPoint| is the point in
 // |view|'s coordinates to show the popup. If a phone, |localPoint| is unused
 // since the display is a sheet, but |view| is still used to attach the sheet to
@@ -22,13 +25,6 @@
                atPoint:(CGPoint)localPoint
                 inView:(UIView*)view;
 
-// Returns whether the context menu is visible.
-- (BOOL)isVisible;
-
-@end
-
-@interface CRUContextMenuController (UsedForTesting)
-@property (readonly) UIActionSheet* sheet;
 @end
 
 #endif  // UI_BASE_IOS_CRU_CONTEXT_MENU_CONTROLLER_H_