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diff --git a/views/controls/native_view_host.h b/views/controls/native_view_host.h
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+++ b/views/controls/native_view_host.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 VIEWS_CONTROLS_NATIVE_VIEW_HOST_H_
+#define VIEWS_CONTROLS_NATIVE_VIEW_HOST_H_
+
+#include <string>
+
+#include "views/view.h"
+
+#include "base/gfx/native_widget_types.h"
+
+namespace views {
+
+// Base class for embedding native widgets in a view.
+class NativeViewHost : public View {
+ public:
+  NativeViewHost();
+  virtual ~NativeViewHost();
+
+  void set_preferred_size(const gfx::Size& size) { preferred_size_ = size; }
+
+  // Returns the preferred size set via set_preferred_size.
+  virtual gfx::Size GetPreferredSize();
+
+  // Overriden to invoke Layout.
+  virtual void VisibilityChanged(View* starting_from, bool is_visible);
+
+  // Invokes any of InstallClip, UninstallClip, ShowWidget or HideWidget
+  // depending upon what portion of the widget is view in the parent.
+  virtual void Layout();
+
+  // A NativeViewHost has an associated focus View so that the focus of the
+  // native control and of the View are kept in sync. In simple cases where the
+  // NativeViewHost directly wraps a native window as is, the associated view
+  // is this View. In other cases where the NativeViewHost is part of another
+  // view (such as TextField), the actual View is not the NativeViewHost and
+  // this method must be called to set that.
+  // This method must be called before Attach().
+  void SetAssociatedFocusView(View* view) { focus_view_ = view; }
+  View* associated_focus_view() { return focus_view_; }
+
+  void set_fast_resize(bool fast_resize) { fast_resize_ = fast_resize; }
+  bool fast_resize() const { return fast_resize_; }
+
+  // The embedded native view.
+  gfx::NativeView native_view() const { return native_view_; }
+
+ protected:
+  // Notification that our visible bounds relative to the root has changed.
+  // Invokes Layout to make sure the widget is positioned correctly.
+  virtual void VisibleBoundsInRootChanged();
+
+  // Sets the native view. Subclasses will typically invoke Layout after setting
+  // the widget.
+  void set_native_view(gfx::NativeView widget) { native_view_ = widget; }
+
+  // Installs a clip on the native widget.
+  virtual void InstallClip(int x, int y, int w, int h) = 0;
+
+  // Removes the clip installed on the native widget by way of InstallClip.
+  virtual void UninstallClip() = 0;
+
+  // Shows the widget at the specified position (relative to the parent widget).
+  virtual void ShowWidget(int x, int y, int w, int h) = 0;
+
+  // Hides the widget. NOTE: this may be invoked when the widget is already
+  // hidden.
+  virtual void HideWidget() = 0;
+
+  void set_installed_clip(bool installed_clip) {
+    installed_clip_ = installed_clip;
+  }
+  bool installed_clip() const { return installed_clip_; }
+
+ private:
+  gfx::NativeView native_view_;
+
+  // The preferred size of this View
+  gfx::Size preferred_size_;
+
+  // Have we installed a region on the HWND used to clip to only the visible
+  // portion of the HWND?
+  bool installed_clip_;
+
+  // Fast resizing will move the hwnd and clip its window region, this will
+  // result in white areas and will not resize the content (so scrollbars
+  // will be all wrong and content will flow offscreen). Only use this
+  // when you're doing extremely quick, high-framerate vertical resizes
+  // and don't care about accuracy. Make sure you do a real resize at the
+  // end. USE WITH CAUTION.
+  bool fast_resize_;
+
+  // The view that should be given focus when this NativeViewHost is focused.
+  View* focus_view_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeViewHost);
+};
+
+}  // namespace views
+
+#endif  // VIEWS_CONTROLS_NATIVE_VIEW_HOST_H_