Convert TrayBubbleView to wm common types

ash/system/tray/system_tray.cc

Index: ash/system/tray/system_tray.cc
diff --git a/ash/system/tray/system_tray.cc b/ash/system/tray/system_tray.cc
index e5e0fdf0a2c89c1ac2d7b7435e1fcbf384bef624..53d1b86f2f464503272c0b4ede4cc7e9ca6b1d2d 100644
--- a/ash/system/tray/system_tray.cc
+++ b/ash/system/tray/system_tray.cc
@@ -15,7 +15,10 @@
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray_accessibility.h"
 #include "ash/common/system/update/tray_update.h"
+#include "ash/common/wm_lookup.h"
+#include "ash/common/wm_root_window_controller.h"
 #include "ash/common/wm_shell.h"
+#include "ash/common/wm_window.h"
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/shell.h"
 #include "ash/system/audio/tray_audio.h"
@@ -663,6 +666,8 @@ void SystemTray::ClickedOutsideBubble() {
   HideBubbleWithView(system_bubble_->bubble_view());
 }
 
+// views::TrayBubbleView::Delegate overrides:

[msw, 2016/06/22 23:00:23]

nit: I'm not a big fan unless the file is consistent about this.

[James Cook, 2016/06/22 23:06:28]

Removed.

+
 void SystemTray::BubbleViewDestroyed() {
   if (system_bubble_) {
     system_bubble_->bubble()->DestroyItemViews();
@@ -691,6 +696,18 @@ gfx::Rect SystemTray::GetAnchorRect(
   return GetBubbleAnchorRect(anchor_widget, anchor_type, anchor_alignment);
 }
 
+void SystemTray::OnBeforeBubbleWidgetInit(
+    views::Widget* anchor_widget,
+    views::Widget* bubble_widget,
+    views::Widget::InitParams* params) const {
+  // Place the bubble in the same root window as |anchor_widget|.
+  WmLookup::Get()
+      ->GetWindowForWidget(anchor_widget)
+      ->GetRootWindowController()
+      ->ConfigureWidgetInitParamsForContainer(
+          bubble_widget, kShellWindowId_SettingBubbleContainer, params);
+}
+
 void SystemTray::HideBubble(const TrayBubbleView* bubble_view) {
   HideBubbleWithView(bubble_view);
 }