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diff --git a/chrome/browser/ui/status_bubble.h b/chrome/browser/ui/status_bubble.h
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+// Copyright (c) 2010 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_STATUS_BUBBLE_H_
+#define CHROME_BROWSER_STATUS_BUBBLE_H_
+#pragma once
+
+#include "base/string16.h"
+
+class GURL;
+namespace gfx {
+class Point;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// StatusBubble interface
+//  An interface implemented by an object providing the status display area of
+//  the browser window.
+//
+class StatusBubble {
+ public:
+  // On hover, expand status bubble to fit long URL after this delay.
+  static const int kExpandHoverDelay = 1600;
+
+  virtual ~StatusBubble() {}
+
+  // Sets the bubble contents to a specific string and causes the bubble
+  // to display immediately. Subsequent empty SetURL calls (typically called
+  // when the cursor exits a link) will set the status bubble back to its
+  // status text. To hide the status bubble again, either call SetStatus
+  // with an empty string, or call Hide().
+  virtual void SetStatus(const string16& status) = 0;
+
+  // Sets the bubble text to a URL - if given a non-empty URL, this will cause
+  // the bubble to fade in and remain open until given an empty URL or until
+  // the Hide() method is called. languages is the value of Accept-Language
+  // to determine what characters are understood by a user.
+  virtual void SetURL(const GURL& url, const string16& languages) = 0;
+
+  // Skip the fade and instant-hide the bubble.
+  virtual void Hide() = 0;
+
+  // Called when the user's mouse has moved over web content. This is used to
+  // determine when the status area should move out of the way of the user's
+  // mouse. This may be windows specific pain due to the way messages are
+  // processed for child HWNDs.  |position| is the absolute position of the
+  // pointer, and |left_content| is true if the mouse just left the content
+  // area.
+  virtual void MouseMoved(const gfx::Point& position, bool left_content) = 0;
+
+  // Called when the download shelf becomes visible or invisible.
+  // This is used by to ensure that the status bubble does not obscure
+  // the download shelf, when it is visible.
+  virtual void UpdateDownloadShelfVisibility(bool visible) = 0;
+};
+
+#endif  // CHROME_BROWSER_STATUS_BUBBLE_H_