ash: Disable some entries in the network tray-popup instead of removing them.

ash/system/tray/tray_views.cc

Index: ash/system/tray/tray_views.cc
diff --git a/ash/system/tray/tray_views.cc b/ash/system/tray/tray_views.cc
index c09b5747e94e97812a1cdf871b3b2cf25ebb0164..f5db4c3f337df883abd63e51a5d6972977d9d222 100644
--- a/ash/system/tray/tray_views.cc
+++ b/ash/system/tray/tray_views.cc
@@ -104,6 +104,7 @@ void HoverHighlightView::AddLabel(const string16& text,
       5, kTrayPopupDetailsIconWidth + kIconPaddingLeft, 5, 0));
   label->SetHorizontalAlignment(views::Label::ALIGN_LEFT);
   label->SetFont(label->font().DeriveFont(0, style));
+  label->SetDisabledColor(SkColorSetARGB(127, 0, 0, 0));
   AddChildView(label);
 
   accessible_name_ = text;
@@ -135,6 +136,11 @@ void HoverHighlightView::GetAccessibleState(ui::AccessibleViewState* state) {
   state->name = accessible_name_;
 }
 
+void HoverHighlightView::OnEnabledChanged() {
+  for (int i = 0; i < child_count(); ++i)
+    child_at(i)->SetEnabled(enabled());
+}
+
 void HoverHighlightView::OnPaintBackground(gfx::Canvas* canvas) {
   canvas->DrawColor(hover_ ? highlight_color_ : default_color_);
 }