Update behavior of one-click infobar to remove modal dialog, add "undo".

chrome/browser/ui/gtk/browser_window_gtk.cc

Index: chrome/browser/ui/gtk/browser_window_gtk.cc
diff --git a/chrome/browser/ui/gtk/browser_window_gtk.cc b/chrome/browser/ui/gtk/browser_window_gtk.cc
index feaf97a4d89270f97352f6ae08b96eaac2dc5494..51e52d4863b1399669c8199c77dd80f62423110a 100644
--- a/chrome/browser/ui/gtk/browser_window_gtk.cc
+++ b/chrome/browser/ui/gtk/browser_window_gtk.cc
@@ -1090,10 +1090,8 @@ void BrowserWindowGtk::ShowChromeToMobileBubble() {
 
 #if defined(ENABLE_ONE_CLICK_SIGNIN)
 void BrowserWindowGtk::ShowOneClickSigninBubble(
-      const base::Closure& learn_more_callback,
-      const base::Closure& advanced_callback) {
-  ignore_result(new OneClickSigninBubbleGtk(this, learn_more_callback,
-                                            advanced_callback));
+      const OneClickSigninBubbleCallback& start_sync_callback) {
+  ignore_result(new OneClickSigninBubbleGtk(this, start_sync_callback));
 }
 #endif