Moves CustomFrameViewAsh to common

ash/wm/panels/panel_frame_view.h

Index: ash/wm/panels/panel_frame_view.h
diff --git a/ash/wm/panels/panel_frame_view.h b/ash/wm/panels/panel_frame_view.h
index 1c0547a2f51a56bc830a42d0bb021fc8b3fe0f05..dbb820704e2e37d74577b3937fd741fa421a9588 100644
--- a/ash/wm/panels/panel_frame_view.h
+++ b/ash/wm/panels/panel_frame_view.h
@@ -19,7 +19,6 @@ class ImageView;
 namespace ash {
 class DefaultHeaderPainter;
 class FrameCaptionButtonContainerView;
-class FrameBorderHitTestController;
 
 class ASH_EXPORT PanelFrameView : public views::NonClientFrameView,
                                   public ShellObserver {
@@ -75,10 +74,6 @@ class ASH_EXPORT PanelFrameView : public views::NonClientFrameView,
   // Helper class for painting the header.
   std::unique_ptr<DefaultHeaderPainter> header_painter_;
 
-  // Updates the hittest bounds overrides based on the window state type.
-  std::unique_ptr<FrameBorderHitTestController>
-      frame_border_hit_test_controller_;
-
   DISALLOW_COPY_AND_ASSIGN(PanelFrameView);
 };
 }