Setup field trial for one-click signin inforbar.

chrome/browser/ui/views/infobars/one_click_signin_infobar.h

Index: chrome/browser/ui/views/infobars/one_click_signin_infobar.h
diff --git a/chrome/browser/ui/views/infobars/one_click_signin_infobar.h b/chrome/browser/ui/views/infobars/one_click_signin_infobar.h
new file mode 100644
index 0000000000000000000000000000000000000000..94047efcf4a340c49e837e3896f50bacfdfa60bb
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+++ b/chrome/browser/ui/views/infobars/one_click_signin_infobar.h
@@ -0,0 +1,31 @@
+// 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.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_INFOBARS_ONE_CLICK_SIGNIN_INFOBAR_H_
+#define CHROME_BROWSER_UI_VIEWS_INFOBARS_ONE_CLICK_SIGNIN_INFOBAR_H_
+
+#include "chrome/browser/api/infobars/one_click_signin_infobar_delegate.h"
+#include "chrome/browser/ui/views/infobars/confirm_infobar.h"
+
+// A speialization of ConfirmInfoBar that allows changing the background
+// colour of the infobar as well as the colour of the OK button.  The behaviour
+// remains the same.
+class OneClickSigninInfoBar : public ConfirmInfoBar {
+ public:
+  OneClickSigninInfoBar(InfoBarTabHelper* owner,
+                        OneClickSigninInfoBarDelegate* delegate);
+  ~OneClickSigninInfoBar();
+
+ private:
+  // ConfirmInfoBar overrides.
+  virtual void ViewHierarchyChanged(bool is_add,
+                                    views::View* parent,
+                                    views::View* child) OVERRIDE;
+
+  OneClickSigninInfoBarDelegate* one_click_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(OneClickSigninInfoBar);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_ONE_CLICK_SIGNIN_INFOBAR_H_