[iOS][Payment-Request] Separator color

Updates the current separator color to a dynamic one.

Bug: 1008832
Change-Id: I1b408fb1b60a6f516fd2bfab430e18f79fbb58dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1855741
Auto-Submit: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Louis Romero <lpromero@chromium.org>
Commit-Queue: Louis Romero <lpromero@chromium.org>
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705037}

ios/chrome/browser/ui/payments/payment_items_display_view_controller.mm

@@ -168,6 +168,7 @@ typedef NS_ENUM(NSInteger, ItemType) {
   self.styler.cellStyle = MDCCollectionViewCellStyleCard;
   self.styler.separatorInset =
       UIEdgeInsetsMake(0, kSeparatorEdgeInset, 0, kSeparatorEdgeInset);
+  self.styler.separatorColor = [UIColor colorNamed:kSeparatorColor];
 }
 
 #pragma mark UICollectionViewDataSource

ios/chrome/browser/ui/payments/payment_request_edit_view_controller.mm

@@ -250,6 +250,7 @@ PaymentsTextItem* ErrorMessageItemForError(NSString* errorMessage) {
   self.styler.cellStyle = MDCCollectionViewCellStyleCard;
   self.styler.separatorInset =
       UIEdgeInsetsMake(0, kSeparatorEdgeInset, 0, kSeparatorEdgeInset);
+  self.styler.separatorColor = [UIColor colorNamed:kSeparatorColor];
 }
 
 - (void)viewDidAppear:(BOOL)animated {

ios/chrome/browser/ui/payments/payment_request_error_view_controller.mm

@@ -98,6 +98,7 @@ typedef NS_ENUM(NSInteger, ItemType) {
   self.styler.cellStyle = MDCCollectionViewCellStyleCard;
   self.styler.separatorInset =
       UIEdgeInsetsMake(0, kSeparatorEdgeInset, 0, kSeparatorEdgeInset);
+  self.styler.separatorColor = [UIColor colorNamed:kSeparatorColor];
 }
 
 #pragma mark UICollectionViewDataSource

ios/chrome/browser/ui/payments/payment_request_selector_view_controller.mm

@@ -185,6 +185,7 @@ typedef NS_ENUM(NSInteger, ItemType) {
   self.styler.cellStyle = MDCCollectionViewCellStyleCard;
   self.styler.separatorInset =
       UIEdgeInsetsMake(0, kSeparatorEdgeInset, 0, kSeparatorEdgeInset);
+  self.styler.separatorColor = [UIColor colorNamed:kSeparatorColor];
 }
 
 #pragma mark UICollectionViewDataSource

ios/chrome/browser/ui/payments/payment_request_view_controller.mm

@@ -239,6 +239,7 @@ typedef NS_ENUM(NSInteger, ItemType) {
   self.styler.cellStyle = MDCCollectionViewCellStyleCard;
   self.styler.separatorInset =
       UIEdgeInsetsMake(0, kSeparatorEdgeInset, 0, kSeparatorEdgeInset);
+  self.styler.separatorColor = [UIColor colorNamed:kSeparatorColor];
 }
 
 - (void)updatePaymentSummaryItem {