Setup field trial for one-click signin inforbar.

chrome/browser/ui/sync/one_click_signin_helper.h

Index: chrome/browser/ui/sync/one_click_signin_helper.h
diff --git a/chrome/browser/ui/sync/one_click_signin_helper.h b/chrome/browser/ui/sync/one_click_signin_helper.h
index f1ffb84185bc4def86089bcdfd904928621ebc91..fcb3e223f2a68927acfa4c4c1af445a9c3207cad 100644
--- a/chrome/browser/ui/sync/one_click_signin_helper.h
+++ b/chrome/browser/ui/sync/one_click_signin_helper.h
@@ -34,6 +34,9 @@ class OneClickSigninHelper : public content::WebContentsObserver {
                        const std::string& email,
                        bool check_connected);
 
+  // Initialize a finch experiment for the infobar.
+  static void InitializeFieldTrial();

[Peter Kasting, 2012/09/11 23:02:07]

Random drive-by nit: The Google style guide says static methods should be below
the constructor rather than above.

[Roger Tawa OOO till Jul 10th, 2012/09/12 15:07:14]

Done.

+
   // Looks for the Google-Accounts-SignIn response header, and if found,
   // tries to display an infobar in the tab contents identified by the
   // child/route id.