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diff --git a/chrome/browser/views/browser_bubble.h b/chrome/browser/views/browser_bubble.h
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+++ b/chrome/browser/views/browser_bubble.h
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+// Copyright (c) 2009 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_VIEWS_BROWSER_BUBBLE_
+#define CHROME_BROWSER_VIEWS_BROWSER_BUBBLE_
+
+#include "views/view.h"
+#include "views/widget/widget.h"
+
+// A class for creating a floating window that is "attached" to a particular
+// Browser.  If you don't install a delegate, the bubble will hide
+// automatically when the browser moves.  The bubble is only shown manually.
+// Users are expected to delete the bubble when finished with it.
+class BrowserBubble {
+ public:
+  // Delegate to browser bubble events.
+  class Delegate {
+   public:
+    // Called when the Browser Window that this bubble is attached to moves.
+    virtual void BubbleBrowserWindowMoved(BrowserBubble* bubble) = 0;
+    virtual void BubbleBrowserWindowClosed(BrowserBubble* bubble) = 0;
+  };
+
+  // Note that the bubble will size itself to the preferred size of |view|.
+  // |view| is the embedded view, |frame| is widget that the bubble is being
+  // positioned relative to, |origin| is the location that the bubble will
+  // be positioned relative to |frame|.
+  BrowserBubble(views::View* view, views::Widget* frame,
+                const gfx::Point& origin);
+  virtual ~BrowserBubble();
+
+  // Get/Set the delegate.
+  Delegate* delegate() const { return delegate_; }
+  void set_delegate(Delegate* del) { delegate_ = del; }
+
+  // Notifications from BrowserView.
+  // With no delegate, both of these default to Hiding the bubble.
+  virtual void BrowserWindowMoved();
+  virtual void BrowserWindowClosed();
+
+  // Show or hide the bubble.
+  void Show();
+  void Hide();
+  bool is_visible() const { return visible_; }
+
+  // The contained view.
+  views::View* view() const { return view_; }
+
+  // Set the bounds of the bubble relative to the browser window.
+  void SetBounds(int x, int y, int w, int h);
+  int width() { return bounds_.width(); }
+  int height() { return bounds_.height(); }
+
+  // Reposition the bubble - as we are using a WS_POPUP for the bubble,
+  // we have to manually position it when the browser window moves.
+  void Reposition();
+
+ protected:
+  // Create the popup widget.
+  virtual void InitPopup();
+
+  // Destroy the popup widget.
+  virtual void DestroyPopup();
+
+  // Move the popup to an absolute position.
+  void MovePopup(int x, int y, int w, int h);
+
+ private:
+  // The frame that this bubble is attached to.
+  views::Widget* frame_;
+
+  // The view that is displayed in this bubble.
+  views::View* view_;
+
+  // The actual widget that this bubble is in.
+  scoped_ptr<views::Widget> popup_;
+
+  // The bounds relative to the frame.
+  gfx::Rect bounds_;
+
+  // Current visibility.
+  bool visible_;
+
+  // The delegate isn't owned by the bubble.
+  Delegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserBubble);
+};
+
+#endif  // CHROME_BROWSER_VIEWS_BROWSER_BUBBLE_