Implement learn more bubble on views.

chrome/browser/ui/views/autofill/tooltip_icon.h

-// Copyright 2013 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_AUTOFILL_TOOLTIP_ICON_H_
-#define CHROME_BROWSER_UI_VIEWS_AUTOFILL_TOOLTIP_ICON_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/strings/string16.h"
-#include "ui/views/controls/image_view.h"
-
-// A tooltip icon (just an ImageView with a tooltip). Looks like (?).
-class TooltipIcon : public views::ImageView {
- public:
-  explicit TooltipIcon(const base::string16& tooltip);
-  virtual ~TooltipIcon();
-
-  // views::View implementation
-  virtual bool GetTooltipText(const gfx::Point& p,
-                              base::string16* tooltip) const OVERRIDE;
- private:
-  base::string16 tooltip_;
-
-  DISALLOW_COPY_AND_ASSIGN(TooltipIcon);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_AUTOFILL_TOOLTIP_ICON_H_