[iOS][DarkMode] Update Green Colors in Payments Request

UX approve stamped this green as the replacement for the old palette.

Bug: 976675
Change-Id: Id9be807b8315d171678605b3aeda5061ff4fe18c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1746177
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Commit-Queue: Louis Romero <lpromero@chromium.org>
Auto-Submit: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Louis Romero <lpromero@chromium.org>
Cr-Commit-Position: refs/heads/master@{#685550}

ios/chrome/browser/ui/payments/cells/page_info_item.mm

@@ -67,7 +67,7 @@ const CGFloat kFaviconDimension = 16;
     NSMutableAttributedString* text = [[NSMutableAttributedString alloc]
         initWithString:cell.pageHostLabel.text];
     [text addAttribute:NSForegroundColorAttributeName
-                 value:[[MDCPalette cr_greenPalette] tint700]
+                 value:[UIColor colorNamed:kGreenColor]
                  range:NSMakeRange(0, strlen(url::kHttpsScheme))];
     // We need to set the font to the attributed portion, or the field doesn't
     // asjust with dynamic types.
@@ -147,8 +147,7 @@ const CGFloat kFaviconDimension = 16;
     _pageLockIndicatorView.accessibilityIdentifier =
         kPageInfoLockIndicatorImageViewID;
     _pageLockIndicatorView.contentMode = UIViewContentModeScaleAspectFit;
-    [_pageLockIndicatorView
-        setTintColor:[[MDCPalette cr_greenPalette] tint700]];
+    [_pageLockIndicatorView setTintColor:[UIColor colorNamed:kGreenColor]];
     [self.contentView addSubview:_pageLockIndicatorView];
 
     // Layout

ios/chrome/browser/ui/payments/cells/price_item.mm

@@ -103,8 +103,7 @@ const CGFloat kMinWidthRatio = 0.5f;
   _itemLabel.textColor = [UIColor colorNamed:kTextPrimaryColor];
 
   SetUILabelScaledFont(_notificationLabel, [MDCTypography body2Font]);
-  _notificationLabel.textColor = [[MDCPalette greenPalette] tint800];
-
+  _notificationLabel.textColor = [UIColor colorNamed:kGreenColor];
   SetUILabelScaledFont(_priceLabel, [MDCTypography body1Font]);
   _priceLabel.textColor = [UIColor colorNamed:kTextPrimaryColor];
 }