Setup field trial for one-click signin inforbar.

chrome/browser/api/infobars/one_click_signin_infobar_delegate.cc

+// 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"
+
+const SkColor OneClickSigninInfoBarDelegate::kDefaultColor =
+    SkColorSetARGB(0, 0, 0, 0);

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

Nit: Unless you need a fully-transparent value, just use SK_ColorBLACK.

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

Removed default colour.

+
+OneClickSigninInfoBarDelegate::OneClickSigninInfoBarDelegate(
+    InfoBarService* infobar_service)
+  : ConfirmInfoBarDelegate(infobar_service) {

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

Nit: Indent 4

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

Done.

+}
+
+OneClickSigninInfoBarDelegate::~OneClickSigninInfoBarDelegate() {
+}
+
+void OneClickSigninInfoBarDelegate::GetAlternateColors(
+    AlternateColors* alt_colors) {
+  alt_colors->infobar_bottom_color = kDefaultColor;
+  alt_colors->infobar_top_color = kDefaultColor;
+  alt_colors->button_text_color = kDefaultColor;
+  alt_colors->button_background_color = kDefaultColor;
+  alt_colors->button_border_color = kDefaultColor;
+}