Makes Panel related classes use ash/wm/common types

ash/wm/workspace/multi_window_resize_controller.cc

Index: ash/wm/workspace/multi_window_resize_controller.cc
diff --git a/ash/wm/workspace/multi_window_resize_controller.cc b/ash/wm/workspace/multi_window_resize_controller.cc
index cd450ee7f1758f98bf0a62c38d99e8b6f084f57e..afbe42df3bbfd9ab41de4389860c08e93d4bf716 100644
--- a/ash/wm/workspace/multi_window_resize_controller.cc
+++ b/ash/wm/workspace/multi_window_resize_controller.cc
@@ -473,7 +473,7 @@ void MultiWindowResizeController::Resize(const gfx::Point& location_in_screen,
 
 void MultiWindowResizeController::CompleteResize() {
   window_resizer_->CompleteDrag();
-  wm::GetWindowState(window_resizer_->GetAuraTarget())->DeleteDragDetails();
+  window_resizer_->GetTarget()->GetWindowState()->DeleteDragDetails();
   window_resizer_.reset();
 
   // Mouse may still be over resizer, if not hide.
@@ -496,7 +496,7 @@ void MultiWindowResizeController::CancelResize() {
   if (!window_resizer_)
     return;  // Happens if window was destroyed and we nuked the WindowResizer.
   window_resizer_->RevertDrag();
-  wm::GetWindowState(window_resizer_->GetAuraTarget())->DeleteDragDetails();
+  window_resizer_->GetTarget()->GetWindowState()->DeleteDragDetails();
   window_resizer_.reset();
   Hide();
 }