chromeos: converts PanelLayoutManager to aura::Window

ash/wm/panels/panel_window_resizer.cc

Index: ash/wm/panels/panel_window_resizer.cc
diff --git a/ash/wm/panels/panel_window_resizer.cc b/ash/wm/panels/panel_window_resizer.cc
index 1425485cc485804a6ea6be039e5c9dad4d89e7e0..f578e61feb79c57b4f6afbb96f5659d39f715c44 100644
--- a/ash/wm/panels/panel_window_resizer.cc
+++ b/ash/wm/panels/panel_window_resizer.cc
@@ -67,7 +67,7 @@ void PanelWindowResizer::Drag(const gfx::Point& location, int event_flags) {
     // The panel's parent already knows that the drag is in progress for this
     // panel.
     if (panel_container_ && GetTarget()->parent() != panel_container_)
-      GetPanelLayoutManager()->StartDragging(WmWindow::Get(GetTarget()));
+      GetPanelLayoutManager()->StartDragging(GetTarget());
   }
   gfx::Point offset;
   gfx::Rect bounds(CalculateBoundsForDrag(location));
@@ -156,7 +156,7 @@ void PanelWindowResizer::StartedDragging() {
   // Tell the panel layout manager that we are dragging this panel before
   // attaching it so that it does not get repositioned.
   if (panel_container_)
-    GetPanelLayoutManager()->StartDragging(WmWindow::Get(GetTarget()));
+    GetPanelLayoutManager()->StartDragging(GetTarget());
   if (!was_attached_) {
     // Attach the panel while dragging, placing it in front of other panels.
     aura::Window* target = GetTarget();
@@ -191,10 +191,8 @@ void PanelWindowResizer::FinishDragging() {
   // If we started the drag in one root window and moved into another root
   // but then canceled the drag we may need to inform the original layout
   // manager that the drag is finished.
-  if (initial_panel_container_ != panel_container_) {
-    PanelLayoutManager::Get(WmWindow::Get(initial_panel_container_))
-        ->FinishDragging();
-  }
+  if (initial_panel_container_ != panel_container_)
+    PanelLayoutManager::Get(initial_panel_container_)->FinishDragging();
   if (panel_container_)
     GetPanelLayoutManager()->FinishDragging();
 }
@@ -207,7 +205,7 @@ void PanelWindowResizer::UpdateLauncherPosition() {
 }
 
 PanelLayoutManager* PanelWindowResizer::GetPanelLayoutManager() {
-  return PanelLayoutManager::Get(WmWindow::Get(panel_container_));
+  return PanelLayoutManager::Get(panel_container_);
 }
 
 }  // namespace ash