Implement NativeWidgetMac::ReorderNativeViews

ui/views/cocoa/bridged_native_widget.h

Index: ui/views/cocoa/bridged_native_widget.h
diff --git a/ui/views/cocoa/bridged_native_widget.h b/ui/views/cocoa/bridged_native_widget.h
index 8f6523042de9eead7500964bd6d0daee8883ae63..f526c9bbaee61f29b568aa3fd6688b3313d18627 100644
--- a/ui/views/cocoa/bridged_native_widget.h
+++ b/ui/views/cocoa/bridged_native_widget.h
@@ -20,6 +20,7 @@
 #import "ui/views/focus/focus_manager.h"
 #include "ui/views/views_export.h"
 #include "ui/views/widget/widget.h"
+#include "ui/views/widget/widget_mac_utils.h"
 
 @class BridgedContentView;
 @class ViewsNSWindowDelegate;
@@ -156,6 +157,11 @@ class VIEWS_EXPORT BridgedNativeWidget
   // Creates a ui::Compositor which becomes responsible for drawing the window.
   void CreateLayer(ui::LayerType layer_type, bool translucent);
 
+  // Updates associated_views_ on NativeViewHost::Attach/Detach

[tapted, 2016/03/17 08:18:58]

nit: .. |associated_views_| .. NativeViewHost::Attach()/Detach().

+  void SetAssociationForView(const views::View* view, NSView* native_view);
+  void ClearAssociationForView(const views::View* view);
+  void ReorderChildViews();

[tapted, 2016/03/17 08:18:58]

This should have a separate comment

+
   NativeWidgetMac* native_widget_mac() { return native_widget_mac_; }
   BridgedContentView* ns_view() { return bridged_view_; }
   NSWindow* ns_window() { return window_; }
@@ -289,6 +295,9 @@ class VIEWS_EXPORT BridgedNativeWidget
   // shadow needs to be invalidated when a frame is received for the new shape.
   bool invalidate_shadow_on_frame_swap_ = false;
 
+  // Contains NativeViewHost->gfx::NativeView associations.
+  views::AssociatedViews associated_views_;
+
   DISALLOW_COPY_AND_ASSIGN(BridgedNativeWidget);
 };