Add a feature flag to gate Wi-Fi sync for ChromeOS.

Bug: 966270
Change-Id: I12169fe0f9e56364c7839521e478008faf3be604
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1626638
Commit-Queue: Jon Mann <[email protected]>
Auto-Submit: Jon Mann <[email protected]>
Reviewed-by: Marc Treib <[email protected]>
Cr-Commit-Position: refs/heads/master@{#662827}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index c096282..a6b86a9 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1881,6 +1881,9 @@
 extern const char kStreamlinedUsbPrinterSetupName[];
 extern const char kStreamlinedUsbPrinterSetupDescription[];
 
+extern const char kSyncWifiConfigurationsName[];
+extern const char kSyncWifiConfigurationsDescription[];
+
 extern const char kTetherName[];
 extern const char kTetherDescription[];