Align the text in ReadingList buttons at center

ios/chrome/browser/ui/reading_list/reading_list_toolbar.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/ui/reading_list/reading_list_toolbar.h"
 
 #include "base/logging.h"
 #import "ios/chrome/browser/ui/alert_coordinator/action_sheet_coordinator.h"
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
 #include "ios/chrome/browser/ui/rtl_geometry.h"
@@ skipping 232 matching lines @@
   UIColor* textColor = isDestructive ? [[MDCPalette cr_redPalette] tint500]
                                      : [[MDCPalette cr_bluePalette] tint500];
   [button setTitleColor:textColor forState:UIControlStateNormal];
   [button setTitleColor:[UIColor lightGrayColor]
                forState:UIControlStateDisabled];
   [button setTitleColor:[textColor colorWithAlphaComponent:0.3]
                forState:UIControlStateHighlighted];
   [[button titleLabel]
       setFont:[[MDCTypography fontLoader] regularFontOfSize:14]];
 
-  NSTextAlignment textAlignement;
   UIControlContentHorizontalAlignment horizontalAlignement;
 
   switch (position) {
     case Leading:
       if (UseRTLLayout()) {
         horizontalAlignement = UIControlContentHorizontalAlignmentRight;
-        textAlignement = NSTextAlignmentRight;
       } else {
         horizontalAlignement = UIControlContentHorizontalAlignmentLeft;
-        textAlignement = NSTextAlignmentLeft;
       }
       break;
 
     case Centered:
       horizontalAlignement = UIControlContentHorizontalAlignmentCenter;
-      textAlignement = NSTextAlignmentCenter;
       break;
 
     case Trailing:
       if (UseRTLLayout()) {
         horizontalAlignement = UIControlContentHorizontalAlignmentLeft;
-        textAlignement = NSTextAlignmentLeft;
       } else {
         horizontalAlignement = UIControlContentHorizontalAlignmentRight;
-        textAlignement = NSTextAlignmentRight;
       }
       break;
   }
 
   button.contentHorizontalAlignment = horizontalAlignement;
-  button.titleLabel.textAlignment = textAlignement;
+  button.titleLabel.textAlignment = NSTextAlignmentCenter;
 
   return button;
 }
 
 - (void)setMarkButtonText:(NSString*)text {
   [self.markButton setTitle:text forState:UIControlStateNormal];
 }
 
 - (void)updateHeight {
   for (UIButton* button in
        @[ _deleteButton, _deleteAllButton, _markButton, _cancelButton ]) {
     if (!button.hidden) {
       CGFloat rect = [button.titleLabel.text
                          cr_pixelAlignedSizeWithFont:button.titleLabel.font]
                          .width;
       if (rect > (self.frame.size.width - 2 * kHorizontalMargin -
                   2 * kHorizontalSpacing) /
                          3 -
                      16) {
         [self.heightDelegate toolbar:self onHeightChanged:ExpandedHeight];
         return;
       }
     }
   }
   [self.heightDelegate toolbar:self onHeightChanged:NormalHeight];
 }
 
 @end