Fix the color of tools menu's disabled elements

The tools menu disabled elements had the standard blue color.
This CL makes sure that they have the correct grey color.

Bug: 843939
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Iddbd9e8ea33d329cd5552d77d3acd54db9b5473a
Reviewed-on: https://chromium-review.googlesource.com/1064050Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559505}

ios/chrome/browser/ui/popup_menu/cells/popup_menu_tools_item.mm

@@ -228,8 +228,10 @@ NSString* const kToolsMenuTextBadgeAccessibilityIdentifier =
 
 - (void)setDestructiveAction:(BOOL)destructiveAction {
   _destructiveAction = destructiveAction;
-  self.titleLabel.textColor = self.contentColor;
-  self.imageView.tintColor = self.contentColor;
+  if (self.userInteractionEnabled) {
+    self.titleLabel.textColor = self.contentColor;
+    self.imageView.tintColor = self.contentColor;
+  }
 }
 
 - (UIColor*)contentColor {