Revert of chromeos: Move ownership of system tray width from chrome to ash

ash/common/system/tray/system_tray.cc

Index: ash/common/system/tray/system_tray.cc
diff --git a/ash/common/system/tray/system_tray.cc b/ash/common/system/tray/system_tray.cc
index db02bb6870cb788044bd8041ab7f7e03aa0119a7..b29adb60a1da6b0192eba1cb27e2e97c4b6deb10 100644
--- a/ash/common/system/tray/system_tray.cc
+++ b/ash/common/system/tray/system_tray.cc
@@ -539,12 +539,11 @@
     // (like network) replaces most of the menu.
     full_system_tray_menu_ = items.size() > 1;
     // The menu width is fixed, and it is a per language setting.
-    int menu_width =
-        std::max(MaterialDesignController::IsSystemTrayMenuMaterial()
-                     ? kMinimumSystemTrayMenuWidthMd
-                     : kMinimumSystemTrayMenuWidth,
-                 l10n_util::GetLocalizedContentsWidthInPixels(
-                     IDS_SYSTEM_TRAY_MENU_BUBBLE_WIDTH_PIXELS));
+    int menu_width = std::max(
+        MaterialDesignController::IsSystemTrayMenuMaterial()
+            ? kMinimumSystemTrayMenuWidthMd
+            : kMinimumSystemTrayMenuWidth,
+        WmShell::Get()->system_tray_delegate()->GetSystemTrayMenuWidth());
 
     TrayBubbleView::InitParams init_params(TrayBubbleView::ANCHOR_TYPE_TRAY,
                                            GetAnchorAlignment(), menu_width,