[ios] Changes ChromeTableVC separator color.

Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I312851c5408ad34f690dc0b456612506350d8be7
Reviewed-on: https://chromium-review.googlesource.com/1116347Reviewed-by: edchin <edchin@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570780}

ios/chrome/browser/ui/table_view/chrome_table_view_controller.mm

@@ -12,12 +12,18 @@
 #import "ios/chrome/browser/ui/table_view/table_view_empty_view.h"
 #import "ios/chrome/browser/ui/table_view/table_view_loading_view.h"
 #import "ios/chrome/browser/ui/table_view/table_view_model.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
 #import "ios/third_party/material_components_ios/src/components/AppBar/src/MaterialAppBar.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
+namespace {
+// Color of the TableView separators.
+const CGFloat kTableViewSeparatorColor = 0xC8C7CC;
+}
+
 @interface ChromeTableViewController ()
 // The loading displayed by [self startLoadingIndicatorWithLoadingMessage:].
 @property(nonatomic, strong) TableViewLoadingView* loadingView;
@@ -78,7 +84,7 @@
   [super viewDidLoad];
 
   [self.tableView setBackgroundColor:self.styler.tableViewBackgroundColor];
-  [self.tableView setSeparatorColor:[UIColor lightGrayColor]];
+  [self.tableView setSeparatorColor:UIColorFromRGB(kTableViewSeparatorColor)];
   [self.tableView setSeparatorInset:UIEdgeInsetsMake(0, 56, 0, 0)];
 
   // Configure the app bar if needed.