Allow a Views client to provide a default frameview for window widgets.

ash/shell.h

 // Copyright (c) 2012 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 ASH_SHELL_H_
 #define ASH_SHELL_H_
 #pragma once
 
 #include <utility>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 
 class CommandLine;
 
 namespace aura {
 class EventFilter;
 class RootWindow;
 class Window;
 }
 namespace gfx {
 class Rect;
 class Size;
 }
+namespace views {
+class NonClientFrameView;
+class Widget;
+}
 
 namespace ash {
 
 class AcceleratorController;
 class Launcher;
 class PowerButtonController;
 class ShellDelegate;
 class WindowCycleController;
 
 namespace internal {
@@ skipping 41 matching lines @@
 
   // Returns true if the screen is locked.
   bool IsScreenLocked() const;
 
   // Returns true if a modal dialog window is currently open.
   bool IsModalWindowOpen() const;
 
   // See enum WindowMode for details.
   bool IsWindowModeCompact() const { return window_mode_ == COMPACT_MODE; }
 
+  // Creates a default views::NonClientFrameView for use by windows in the
+  // Ash environment.
+  views::NonClientFrameView* CreateDefaultNonClientFrameView(
+      views::Widget* widget);
+
   AcceleratorController* accelerator_controller() {
     return accelerator_controller_.get();
   }
   internal::TooltipController* tooltip_controller() {
     return tooltip_controller_.get();
   }
   PowerButtonController* power_button_controller() {
     return power_button_controller_.get();
   }
   WindowCycleController* window_cycle_controller() {
@@ skipping 69 matching lines @@
   // The |window_mode_| never changes after the shell is initialized.
   // Switching modes requires a restart.
   WindowMode window_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_