system tray ui change for AllowOnlyPolicyNetworksToConnect

ash/system/tray/hover_highlight_view.cc

Index: ash/system/tray/hover_highlight_view.cc
diff --git a/ash/system/tray/hover_highlight_view.cc b/ash/system/tray/hover_highlight_view.cc
index 164cb41e3c0c7c07454f048212703a2ac410555a..6a565bac948f455219d15c988348b80caf944723 100644
--- a/ash/system/tray/hover_highlight_view.cc
+++ b/ash/system/tray/hover_highlight_view.cc
@@ -240,4 +240,18 @@ void HoverHighlightView::OnFocus() {
   ActionableView::OnFocus();
 }
 
+bool HoverHighlightView::GetTooltipText(const gfx::Point& p,
+                                        base::string16* tooltip) const {
+  if (tooltip_.length()) {
+    *tooltip = tooltip_;
+    return true;
+  } else {
+    return false;
+  }
+}
+
+void HoverHighlightView::SetTooltipText(const base::string16& tooltip) {
+  tooltip_ = tooltip;
+}
+
 }  // namespace ash