Moves management of transients out of Window

ui/views/corewm/window_util.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 UI_VIEWS_COREWM_WINDOW_UTIL_H_
 #define UI_VIEWS_COREWM_WINDOW_UTIL_H_
 
+#include <vector>
+
 #include "base/compiler_specific.h"
 #include "ui/views/views_export.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ui {
 class Layer;
 }
@@ skipping 22 matching lines @@
 // animations that want to animate between the existing visuals and a new window
 // state. The caller owns the return value.
 //
 // As a result of this |window| has freshly created layers, meaning the layers
 // are all empty (nothing has been painted to them) and are sized to 0x0. Soon
 // after this call you need to reset the bounds of the window. Or, you can pass
 // true as the second argument to let the function do that.
 VIEWS_EXPORT ui::Layer* RecreateWindowLayers(aura::Window* window,
                                             bool set_bounds) WARN_UNUSED_RESULT;
 
+// Convenience functions that get the TransientWindowManager for the window and
+// redirect appropriately. These are preferable to calling functions on
+// TransientWindowManager as they handle the appropriate NULL checks.
+VIEWS_EXPORT aura::Window* GetTransientParent(aura::Window* window);
+VIEWS_EXPORT const aura::Window* GetTransientParent(const aura::Window* window);
+VIEWS_EXPORT const std::vector<aura::Window*>& GetTransientChildren(
+    const aura::Window* window);
+VIEWS_EXPORT void AddTransientChild(aura::Window* parent, aura::Window* child);
+VIEWS_EXPORT void RemoveTransientChild(aura::Window* parent,
+                                       aura::Window* child);
+
+// Returns true if |window| has |ancestor| as a transient ancestor. A transient
+// ancestor is found by following the transient parent chain of the window.
+VIEWS_EXPORT bool HasTransientAncestor(const aura::Window* window,
+                                       const aura::Window* ancestor);
+
 }  // namespace corewm
 }  // namespace views
 
 #endif  // UI_VIEWS_COREWM_WINDOW_UTIL_H_