Makes functions in container_finder take aura::Window

ash/wm/container_finder.h

Index: ash/wm/container_finder.h
diff --git a/ash/wm/container_finder.h b/ash/wm/container_finder.h
index 4d0f0e52bbe113b2051322d5f165fd6c1214281a..f7d0c931dc8256c159f998a0033d038fc34191dd 100644
--- a/ash/wm/container_finder.h
+++ b/ash/wm/container_finder.h
@@ -18,18 +18,15 @@ class Rect;
 }
 
 namespace ash {
-
-class WmWindow;
-
 namespace wm {
 
 // Returns the first ancestor of |window| that has a known container ID.
-ASH_EXPORT WmWindow* GetContainerForWindow(WmWindow* window);
+ASH_EXPORT aura::Window* GetContainerForWindow(aura::Window* window);
 
 // Returns the parent to add |window| to. This is generally used when a window
 // is moved from one root to another.
-ASH_EXPORT WmWindow* GetDefaultParent(WmWindow* window,
-                                      const gfx::Rect& bounds);
+ASH_EXPORT aura::Window* GetDefaultParent(aura::Window* window,
+                                          const gfx::Rect& bounds);
 
 // Returns the list of containers that match |container_id| in all root windows.
 // If |priority_root| is non-null, the container in |priority_root| is placed at