[iOS] Updates customSeparator leading anchor

This CL updates the customSeparator leading anchor according to the
text's leading anchor of each cells.

see: https://drive.google.com/file/d/1fzYGSTxmrU2iGN-GFd_NmXwHXj4i42_M/view?usp=sharing

Bug: 922511
Change-Id: Iddb7d1875ea8f169e7608c5a4f2c59fa2c78e48a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2460893
Commit-Queue: Ewann Pellé <ewannpv@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821248}

ios/chrome/browser/ui/settings/cells/settings_image_detail_text_cell.mm

@@ -110,6 +110,10 @@
         constraintGreaterThanOrEqualToAnchor:textStackView.bottomAnchor
                                     constant:
                                         kTableViewTwoLabelsCellVerticalSpacing],
+
+    // Leading constraint for |customSepartor|.
+    [self.customSeparator.leadingAnchor
+        constraintEqualToAnchor:self.textLabel.leadingAnchor],
   ]];
 }
 

ios/chrome/browser/ui/settings/cells/settings_switch_cell.mm

@@ -150,6 +150,10 @@ const CGFloat kIconImageSize = 28;
           constraintEqualToAnchor:_detailTextLabel.bottomAnchor],
       [_textLabel.bottomAnchor
           constraintEqualToAnchor:_detailTextLabel.topAnchor],
+
+      // Leading constraint for |customSepartor|.
+      [self.customSeparator.leadingAnchor
+          constraintEqualToAnchor:_textLabel.leadingAnchor],
     ]];
 
     if (UIContentSizeCategoryIsAccessibilityCategory(

ios/chrome/browser/ui/table_view/cells/table_view_detail_icon_item.mm

@@ -185,6 +185,10 @@ const CGFloat kCellLabelsWidthProportion = 3.0f;
       [_iconImageView.centerYAnchor
           constraintEqualToAnchor:contentView.centerYAnchor],
       _iconHiddenConstraint,
+
+      // Leading constraint for |customSepartor|.
+      [self.customSeparator.leadingAnchor
+          constraintEqualToAnchor:_textLabel.leadingAnchor],
     ]];
 
     AddOptionalVerticalPadding(contentView, _textLabel,