Shuffles and renames ash/common/wm classes

ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h

Index: ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h
diff --git a/ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h b/ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h
index 74023ec00ba1d9d9330e599d7d5dc8525441fa48..ec4fe686d75c92abbea007c5e26d72f59b981fe8 100644
--- a/ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h
+++ b/ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h
@@ -9,9 +9,11 @@
 #include "ash/common/wm/wm_types.h"
 
 namespace ash {
+
+class WmWindow;
+
 namespace wm {
 class WindowState;
-class WmWindow;
 }
 
 // A delegate which can be set to create and control a backdrop which gets
@@ -21,17 +23,17 @@ class ASH_EXPORT WorkspaceLayoutManagerBackdropDelegate {
   virtual ~WorkspaceLayoutManagerBackdropDelegate() {}
 
   // A window got added to the layout.
-  virtual void OnWindowAddedToLayout(wm::WmWindow* child) = 0;
+  virtual void OnWindowAddedToLayout(WmWindow* child) = 0;
 
   // A window got removed from the layout.
-  virtual void OnWindowRemovedFromLayout(wm::WmWindow* child) = 0;
+  virtual void OnWindowRemovedFromLayout(WmWindow* child) = 0;
 
   // The visibility of a window has changed.
-  virtual void OnChildWindowVisibilityChanged(wm::WmWindow* child,
+  virtual void OnChildWindowVisibilityChanged(WmWindow* child,
                                               bool visible) = 0;
 
   // The stacking order of a window has changed.
-  virtual void OnWindowStackingChanged(wm::WmWindow* window) = 0;
+  virtual void OnWindowStackingChanged(WmWindow* window) = 0;
 
   // A window state type has changed.
   virtual void OnPostWindowStateTypeChange(wm::WindowState* window_state,