Adds --enable-sync-oauth, enabling INFO logging of oauth_token cookies

chrome/browser/sync/profile_sync_service.h

Index: chrome/browser/sync/profile_sync_service.h
diff --git a/chrome/browser/sync/profile_sync_service.h b/chrome/browser/sync/profile_sync_service.h
index f4ee9c5c8e19f835aab24a6a09bb33714b8ea529..df8d3793957b67c8553b7bf120a4b7b03734dc5e 100644
--- a/chrome/browser/sync/profile_sync_service.h
+++ b/chrome/browser/sync/profile_sync_service.h
@@ -38,6 +38,7 @@ class NotificationSource;
 class Profile;
 class ProfileSyncFactory;
 class SigninManager;
+struct ChromeCookieDetails;
 
 namespace browser_sync {
 class BackendMigrator;
@@ -208,6 +209,10 @@ class ProfileSyncService : public browser_sync::SyncFrontend,
                                    const std::string& captcha,
                                    const std::string& access_code);
 
+  // Called when a cookie, e. g. oauth_token, changes
+  virtual void OnCookieChanged(Profile* profile,
+                               ChromeCookieDetails* cookie_details);
+
   // Update the last auth error and notify observers of error state.
   void UpdateAuthErrorState(const GoogleServiceAuthError& error);