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

chrome/browser/ui/gtk/browser_window_gtk.h

Index: chrome/browser/ui/gtk/browser_window_gtk.h
diff --git a/chrome/browser/ui/gtk/browser_window_gtk.h b/chrome/browser/ui/gtk/browser_window_gtk.h
index ee95bee8846ce2dd02f9033f1ad2c6a1a5ae8851..aaed73ef140e70f78096f73cb02225270522ec33 100644
--- a/chrome/browser/ui/gtk/browser_window_gtk.h
+++ b/chrome/browser/ui/gtk/browser_window_gtk.h
@@ -125,8 +125,7 @@ class BrowserWindowGtk : public BrowserWindow,
   virtual void ShowChromeToMobileBubble() OVERRIDE;
 #if defined(ENABLE_ONE_CLICK_SIGNIN)
   virtual void ShowOneClickSigninBubble(
-      const base::Closure& learn_more_callback,
-      const base::Closure& advanced_callback) OVERRIDE;
+      const base::Callback<void(bool)>& start_sync_callback) OVERRIDE;
 #endif
   virtual bool IsDownloadShelfVisible() const OVERRIDE;
   virtual DownloadShelf* GetDownloadShelf() OVERRIDE;