Stop re-adding subviews to keyboard accessory view.

ios/chrome/browser/ui/toolbar/new_keyboard_accessory_view.mm

Index: ios/chrome/browser/ui/toolbar/new_keyboard_accessory_view.mm
diff --git a/ios/chrome/browser/ui/toolbar/new_keyboard_accessory_view.mm b/ios/chrome/browser/ui/toolbar/new_keyboard_accessory_view.mm
index 79da47e65a36d8035a252e892e7e252362b727ec..7aa8597def888dc8a881a999d9952088f1631873 100644
--- a/ios/chrome/browser/ui/toolbar/new_keyboard_accessory_view.mm
+++ b/ios/chrome/browser/ui/toolbar/new_keyboard_accessory_view.mm
@@ -43,8 +43,6 @@
 
 - (instancetype)initWithButtons:(NSArray<NSString*>*)buttonTitles
                        delegate:(id<KeyboardAccessoryViewDelegate>)delegate {
-  DCHECK(!IsIPadIdiom());
-
   const CGFloat kViewHeight = 44.0;
   CGFloat width = [[UIScreen mainScreen] bounds].size.width;
   // TODO(734512): Have the creator of the view define the size.
@@ -54,12 +52,12 @@
   if (self) {
     _buttonTitles = buttonTitles;
     _delegate = delegate;
-
+    [self addSubviews];
   }
   return self;
 }
 
-- (void)willMoveToSuperview:(UIView*)newSuperview {
+- (void)addSubviews {
   if (!self.subviews.count)
     return;