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diff --git a/ui/views/widget/native_widget_private.h b/ui/views/widget/native_widget_private.h
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+// Copyright (c) 2011 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 UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
+#define UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
+#pragma once
+
+#include "base/string16.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/views/ime/input_method_delegate.h"
+#include "ui/views/widget/native_widget.h"
+
+namespace gfx {
+class Rect;
+}
+
+namespace ui {
+class OSExchangeData;
+}
+
+namespace views {
+class InputMethod;
+class TooltipManager;
+namespace internal {
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeWidgetPrivate interface
+//
+//  A NativeWidget subclass internal to views that provides Widget a conduit for
+//  communication with a backend-specific native widget implementation.
+//
+//  Many of the methods here are pass-thrus for Widget, and as such there is no
+//  documentation for them here. In that case, see methods of the same name in
+//  widget.h.
+//
+//  IMPORTANT: This type is intended for use only by the views system and for
+//             NativeWidget implementations. This file should not be included
+//             in code that does not fall into one of these use cases.
+//
+class VIEWS_EXPORT NativeWidgetPrivate : public NativeWidget,
+                                         public internal::InputMethodDelegate {
+ public:
+  virtual ~NativeWidgetPrivate() {}
+
+  // Creates an appropriate default NativeWidgetPrivate implementation for the
+  // current OS/circumstance.
+  static NativeWidgetPrivate* CreateNativeWidget(
+      internal::NativeWidgetDelegate* delegate);
+
+  static NativeWidgetPrivate* GetNativeWidgetForNativeView(
+      gfx::NativeView native_view);
+  static NativeWidgetPrivate* GetNativeWidgetForNativeWindow(
+      gfx::NativeWindow native_window);
+
+  // Retrieves the top NativeWidgetPrivate in the hierarchy containing the given
+  // NativeView, or NULL if there is no NativeWidgetPrivate that contains it.
+  static NativeWidgetPrivate* GetTopLevelNativeWidget(
+      gfx::NativeView native_view);
+
+  static void GetAllChildWidgets(gfx::NativeView native_view,
+                                 Widget::Widgets* children);
+  static void ReparentNativeView(gfx::NativeView native_view,
+                                 gfx::NativeView new_parent);
+
+  // Returns true if any mouse button is currently down.
+  static bool IsMouseButtonDown();
+
+  // Initializes the NativeWidget.
+  virtual void InitNativeWidget(const Widget::InitParams& params) = 0;
+
+  // Returns a NonClientFrameView for the widget's NonClientView, or NULL if
+  // the NativeWidget wants no special NonClientFrameView.
+  virtual NonClientFrameView* CreateNonClientFrameView() = 0;
+
+  virtual void UpdateFrameAfterFrameChange() = 0;
+  virtual bool ShouldUseNativeFrame() const = 0;
+  virtual void FrameTypeChanged() = 0;
+
+  // Returns the Widget associated with this NativeWidget. This function is
+  // guaranteed to return non-NULL for the lifetime of the NativeWidget.
+  virtual Widget* GetWidget() = 0;
+  virtual const Widget* GetWidget() const = 0;
+
+  // Returns the NativeView/Window associated with this NativeWidget.
+  virtual gfx::NativeView GetNativeView() const = 0;
+  virtual gfx::NativeWindow GetNativeWindow() const = 0;
+
+  // Returns the topmost Widget in a hierarchy.
+  virtual Widget* GetTopLevelWidget() = 0;
+
+  // Returns the Compositor, or NULL if there isn't one associated with this
+  // NativeWidget.
+  virtual const ui::Compositor* GetCompositor() const = 0;
+  virtual ui::Compositor* GetCompositor() = 0;
+
+  // See description in View for details.
+  virtual void CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
+                                                  ui::Layer** layer_parent) = 0;
+  virtual void ReorderLayers() = 0;
+
+  // Notifies the NativeWidget that a view was removed from the Widget's view
+  // hierarchy.
+  virtual void ViewRemoved(View* view) = 0;
+
+  // Sets/Gets a native window property on the underlying native window object.
+  // Returns NULL if the property does not exist. Setting the property value to
+  // NULL removes the property.
+  virtual void SetNativeWindowProperty(const char* name, void* value) = 0;
+  virtual void* GetNativeWindowProperty(const char* name) const = 0;
+
+  // Returns the native widget's tooltip manager. Called from the View hierarchy
+  // to update tooltips.
+  virtual TooltipManager* GetTooltipManager() const = 0;
+
+  // Returns true if a system screen reader is active for the NativeWidget.
+  virtual bool IsScreenReaderActive() const = 0;
+
+  // Notify native Accessibility clients of an event.
+  virtual void SendNativeAccessibilityEvent(
+      View* view,
+      ui::AccessibilityTypes::Event event_type) = 0;
+
+  // Sets or releases event capturing for this native widget.
+  virtual void SetMouseCapture() = 0;
+  virtual void ReleaseMouseCapture() = 0;
+
+  // Returns true if this native widget is capturing mouse events.
+  virtual bool HasMouseCapture() const = 0;
+
+  // Returns the InputMethod for this native widget.
+  // Note that all widgets in a widget hierarchy share the same input method.
+  // TODO(suzhe): rename to GetInputMethod() when NativeWidget implementation
+  // class doesn't inherit Widget anymore.
+  virtual InputMethod* CreateInputMethod() = 0;
+
+
+  // Centers the window and sizes it to the specified size.
+  virtual void CenterWindow(const gfx::Size& size) = 0;
+
+  // Retrieves the window's current restored bounds and "show" state, for
+  // persisting.
+  virtual void GetWindowPlacement(
+      gfx::Rect* bounds,
+      ui::WindowShowState* show_state) const = 0;
+
+  // Sets the NativeWindow title.
+  virtual void SetWindowTitle(const string16& title) = 0;
+
+  // Sets the Window icons. |window_icon| is a 16x16 icon suitable for use in
+  // a title bar. |app_icon| is a larger size for use in the host environment
+  // app switching UI.
+  virtual void SetWindowIcons(const SkBitmap& window_icon,
+                              const SkBitmap& app_icon) = 0;
+
+  // Update native accessibility properties on the native window.
+  virtual void SetAccessibleName(const string16& name) = 0;
+  virtual void SetAccessibleRole(ui::AccessibilityTypes::Role role) = 0;
+  virtual void SetAccessibleState(ui::AccessibilityTypes::State state) = 0;
+
+  // Makes the NativeWindow modal.
+  virtual void BecomeModal() = 0;
+
+  // See method documentation in Widget.
+  virtual gfx::Rect GetWindowScreenBounds() const = 0;
+  virtual gfx::Rect GetClientAreaScreenBounds() const = 0;
+  virtual gfx::Rect GetRestoredBounds() const = 0;
+  virtual void SetBounds(const gfx::Rect& bounds) = 0;
+  virtual void SetSize(const gfx::Size& size) = 0;
+  virtual void MoveAbove(gfx::NativeView native_view) = 0;
+  virtual void MoveToTop() = 0;
+  virtual void SetShape(gfx::NativeRegion shape) = 0;
+  virtual void Close() = 0;
+  virtual void CloseNow() = 0;
+  virtual void EnableClose(bool enable) = 0;
+  virtual void Show() = 0;
+  virtual void Hide() = 0;
+  // Invoked if the initial show should maximize the window. |restored_bounds|
+  // is the bounds of the window when not maximized.
+  virtual void ShowMaximizedWithBounds(const gfx::Rect& restored_bounds) = 0;
+  virtual void ShowWithWindowState(ui::WindowShowState show_state) = 0;
+  virtual bool IsVisible() const = 0;
+  virtual void Activate() = 0;
+  virtual void Deactivate() = 0;
+  virtual bool IsActive() const = 0;
+  virtual void SetAlwaysOnTop(bool always_on_top) = 0;
+  virtual void Maximize() = 0;
+  virtual void Minimize() = 0;
+  virtual bool IsMaximized() const = 0;
+  virtual bool IsMinimized() const = 0;
+  virtual void Restore() = 0;
+  virtual void SetFullscreen(bool fullscreen) = 0;
+  virtual bool IsFullscreen() const = 0;
+  virtual void SetOpacity(unsigned char opacity) = 0;
+  virtual void SetUseDragFrame(bool use_drag_frame) = 0;
+  virtual bool IsAccessibleWidget() const = 0;
+  virtual void RunShellDrag(View* view,
+                            const ui::OSExchangeData& data,
+                            int operation) = 0;
+  virtual void SchedulePaintInRect(const gfx::Rect& rect) = 0;
+  virtual void SetCursor(gfx::NativeCursor cursor) = 0;
+  virtual void ClearNativeFocus() = 0;
+  virtual void FocusNativeView(gfx::NativeView native_view) = 0;
+  virtual bool ConvertPointFromAncestor(
+      const Widget* ancestor, gfx::Point* point) const = 0;
+  virtual gfx::Rect GetWorkAreaBoundsInScreen() const = 0;
+  virtual void SetInactiveRenderingDisabled(bool value) = 0;
+
+  // Overridden from NativeWidget:
+  virtual internal::NativeWidgetPrivate* AsNativeWidgetPrivate() OVERRIDE;
+};
+
+}  // namespace internal
+}  // namespace views
+
+#endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_