Add about:flags entry for kWalletRequiresFirstSyncSetupComplete

This will make manual testing much easier.

Bug: 1113713
Change-Id: I44eb67a06c33e2fec9450ab00f70de10fc399e2f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2442732
Commit-Queue: Marc Treib <[email protected]>
Reviewed-by: Matthias Körber <[email protected]>
Cr-Commit-Position: refs/heads/master@{#813196}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 1fa701f..ff7ef845 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1852,6 +1852,9 @@
 extern const char kTabbedAppOverflowMenuThreeButtonActionbarName[];
 extern const char kTabbedAppOverflowMenuThreeButtonActionbarDescription[];
 
+extern const char kWalletRequiresFirstSyncSetupCompleteName[];
+extern const char kWalletRequiresFirstSyncSetupCompleteDescription[];
+
 // Non-Android ----------------------------------------------------------------
 
 #else  // !defined(OS_ANDROID)