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diff --git a/chrome/browser/ui/views/frame/browser_frame.h b/chrome/browser/ui/views/frame/browser_frame.h
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+++ b/chrome/browser/ui/views/frame/browser_frame.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_UI_VIEWS_FRAME_BROWSER_FRAME_H_
+#define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_H_
+#pragma once
+
+#include "build/build_config.h"
+#include "views/window/non_client_view.h"
+
+class BaseTabStrip;
+class BrowserView;
+class Profile;
+class ThemeProvider;
+
+namespace gfx {
+class Font;
+class Rect;
+}  // namespace gfx
+
+namespace views {
+class Window;
+
+#if defined(OS_WIN)
+class WindowWin;
+#endif
+}  // namespace views
+
+// This is a virtual interface that allows system specific browser frames.
+class BrowserFrame {
+ public:
+  virtual ~BrowserFrame() {}
+
+  // Creates the appropriate BrowserFrame for this platform. The returned
+  // object is owned by the caller.
+  static BrowserFrame* Create(BrowserView* browser_view, Profile* profile);
+
+  static const gfx::Font& GetTitleFont();
+
+  // Returns the Window associated with this frame. Guraranteed non-NULL after
+  // construction.
+  virtual views::Window* GetWindow() = 0;
+
+  // Determine the distance of the left edge of the minimize button from the
+  // left edge of the window. Used in our Non-Client View's Layout.
+  virtual int GetMinimizeButtonOffset() const = 0;
+
+  // Retrieves the bounds, in non-client view coordinates for the specified
+  // TabStrip.
+  virtual gfx::Rect GetBoundsForTabStrip(BaseTabStrip* tabstrip) const = 0;
+
+  // Returns the y coordinate within the window at which the horizontal TabStrip
+  // begins (or would begin).  If |restored| is true, this is calculated as if
+  // we were in restored mode regardless of the current mode.
+  virtual int GetHorizontalTabStripVerticalOffset(bool restored) const = 0;
+
+  // Tells the frame to update the throbber.
+  virtual void UpdateThrobber(bool running) = 0;
+
+  // Tells the frame to continue a drag detached tab operation.
+  virtual void ContinueDraggingDetachedTab() = 0;
+
+  // Returns the theme provider for this frame.
+  virtual ThemeProvider* GetThemeProviderForFrame() const = 0;
+
+  // Returns true if the window should use the native frame view. This is true
+  // if there are no themes applied on Vista, or if there are themes applied and
+  // this browser window is an app or popup.
+  virtual bool AlwaysUseNativeFrame() const = 0;
+
+  // Returns the NonClientFrameView of this frame.
+  virtual views::View* GetFrameView() const = 0;
+
+  // Notifies the frame that the tab strip display mode changed so it can update
+  // its frame treatment if necessary.
+  virtual void TabStripDisplayModeChanged() = 0;
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_H_