Add flag for the counters and time selection UI in CBD

ios/chrome/browser/experimental_flags.mm

Index: ios/chrome/browser/experimental_flags.mm
diff --git a/ios/chrome/browser/experimental_flags.mm b/ios/chrome/browser/experimental_flags.mm
index 4f7ba33018d2d1c2cbdb58d539530d74211fd53b..df980e9f4110cc0e5199b18048df174976f44916 100644
--- a/ios/chrome/browser/experimental_flags.mm
+++ b/ios/chrome/browser/experimental_flags.mm
@@ -29,6 +29,7 @@ NSString* const kHeuristicsForPasswordGeneration =
 NSString* const kEnableReadingList = @"EnableReadingList";
 NSString* const kUpdatePasswordUIEnabled = @"UpdatePasswordUIEnabled";
 NSString* const kEnableQRCodeReader = @"EnableQRCodeReader";
+NSString* const kEnableNewClearBrowsingDataUI = @"EnableNewClearBrowsingDataUI";
 }  // namespace
 
 namespace experimental_flags {
@@ -153,4 +154,12 @@ bool IsQRCodeReaderEnabled() {
       boolForKey:kEnableQRCodeReader];
 }
 
+bool IsNewClearBrowsingDataUIEnabled() {
+  NSString* countersFlag = [[NSUserDefaults standardUserDefaults]
+      objectForKey:kEnableNewClearBrowsingDataUI];
+  if ([countersFlag isEqualToString:@"Enabled"])
+    return true;
+  return false;
+}
+
 }  // namespace experimental_flags