Setup field trial for one-click signin inforbar.

chrome/browser/api/infobars/one_click_signin_infobar_delegate.cc

Index: chrome/browser/api/infobars/one_click_signin_infobar_delegate.cc
diff --git a/chrome/browser/api/infobars/one_click_signin_infobar_delegate.cc b/chrome/browser/api/infobars/one_click_signin_infobar_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a1aac038ddb2dffd8eeaba9a44d5e68865ab4a06
--- /dev/null
+++ b/chrome/browser/api/infobars/one_click_signin_infobar_delegate.cc
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/api/infobars/one_click_signin_infobar_delegate.h"
+
+OneClickSigninInfoBarDelegate::OneClickSigninInfoBarDelegate(
+    InfoBarService* infobar_service)
+    : ConfirmInfoBarDelegate(infobar_service) {
+}
+
+OneClickSigninInfoBarDelegate::~OneClickSigninInfoBarDelegate() {
+}
+
+void OneClickSigninInfoBarDelegate::GetAlternateColors(
+    AlternateColors* alt_colors) {
+  alt_colors->enabled = false;
+}