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diff --git a/chrome/browser/chromeos/compact_location_bar_host.h b/chrome/browser/chromeos/compact_location_bar_host.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_CHROMEOS_COMPACT_LOCATION_BAR_HOST_H_
+#define CHROME_BROWSER_CHROMEOS_COMPACT_LOCATION_BAR_HOST_H_
+
+#include "app/animation.h"
+#include "app/gfx/native_widget_types.h"
+#include "base/gfx/rect.h"
+#include "base/timer.h"
+#include "chrome/browser/tabs/tab_strip_model.h"
+#include "chrome/browser/views/dropdown_bar_host.h"
+#include "views/controls/textfield/textfield.h"
+
+class BrowserView;
+class TabContents;
+class Tab;
+
+namespace chromeos {
+
+class CompactLocationBarView;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// The CompactLocationBarHost implements the container window for the
+// floating location bar. It uses the appropriate implementation from
+// compact_location_bar_host_gtk.cc to draw its content and is
+// responsible for showing, hiding, closing, and moving the window.
+//
+// There is one CompactLocationBarHost per BrowserView, and its state
+// is updated whenever the selected Tab is changed. The
+// CompactLocationBarHost is created when the BrowserView is attached
+// to the frame's Widget for the first time, and enabled/disabled
+// when the compact navigation bar is toggled.
+//
+////////////////////////////////////////////////////////////////////////////////
+class CompactLocationBarHost : public DropdownBarHost,
+                               public TabStripModelObserver {
+ public:
+  explicit CompactLocationBarHost(BrowserView* browser_view);
+  virtual ~CompactLocationBarHost();
+
+  // Returns the bounds to locale the compact location bar under the tab.
+  gfx::Rect GetBoundsUnderTab(int tab_index) const;
+
+  // Updates the content and the position of the compact location bar.
+  // |index| is the index of the tab the compact location bar
+  // will be attached to and |animate| specifies if the location bar
+  // should animate when shown.
+  void Update(int index, bool animate);
+
+  // (Re)Starts the popup timer that hides the popup after X seconds.
+  void StartAutoHideTimer();
+
+  // Cancels the popup timer.
+  void CancelAutoHideTimer();
+
+  // Enable/disable the compact location bar.
+  void SetEnabled(bool enabled);
+
+  // Overridden from views::AcceleratorTarget in DropdownBarHost class.
+  virtual bool AcceleratorPressed(const views::Accelerator& accelerator);
+
+  // Overridden from DropdownBarHost class.
+  virtual gfx::Rect GetDialogPosition(gfx::Rect avoid_overlapping_rect);
+  virtual void SetDialogPosition(const gfx::Rect& new_pos, bool no_redraw);
+
+  // Overriden from TabStripModelObserver class.
+  virtual void TabInsertedAt(TabContents* contents,
+                             int index,
+                             bool foreground);
+  virtual void TabClosingAt(TabContents* contents, int index);
+  virtual void TabSelectedAt(TabContents* old_contents,
+                             TabContents* new_contents,
+                             int index,
+                             bool user_gesture);
+  virtual void TabMoved(TabContents* contents,
+                        int from_index,
+                        int to_index,
+                        bool pinned_state_changed);
+  virtual void TabChangedAt(TabContents* contents, int index,
+                            TabChangeType change_type);
+
+ private:
+  void HideCallback() {
+    Hide(true);
+  }
+
+  // Returns CompactLocationBarView.
+  CompactLocationBarView* GetClbView();
+
+  bool IsCurrentTabIndex(int index);
+
+  // The index of the tab that the compact location bar is attached to.
+  int current_tab_index_;
+
+  scoped_ptr<base::OneShotTimer<CompactLocationBarHost> > auto_hide_timer_;
+
+  DISALLOW_COPY_AND_ASSIGN(CompactLocationBarHost);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_COMPACT_LOCATION_BAR_HOST_H_