[ash-md] Added a delay between system menu default/detailed view transitions.

ash/common/system/tray/tray_constants.cc

Index: ash/common/system/tray/tray_constants.cc
diff --git a/ash/common/system/tray/tray_constants.cc b/ash/common/system/tray/tray_constants.cc
index 6b6f96bb661db1ea0efa2a18e01d7bfa9ac6593a..20d2020c5f36b0daf0016101d66bd86b49bf80b2 100644
--- a/ash/common/system/tray/tray_constants.cc
+++ b/ash/common/system/tray/tray_constants.cc
@@ -115,6 +115,8 @@ int GetTrayConstant(TrayConstant constant) {
   const int kTrayPopupItemRightInset[] = {0, 0, 0};
   const int kTrayPopupItemMinStartWidth[] = {46, 48, 48};
   const int kTrayPopupItemMinEndWidth[] = {40, 40, 40};
+  const int kTrayPopupTransitionToDefaultViewDelayMs[] = {0, 80, 100};
+  const int kTrayPopupTransitionToDetailedViewDelayMs[] = {0, 80, 100};
   const int kVirtualKeyboardButtonSize[] = {39, kTrayItemSize, kTrayItemSize};
   const int kTrayImeMenuIcon[] = {40, kTrayItemSize, kTrayItemSize};
   const int kTrayImageItemPadding[] = {1, 3, 3};
@@ -148,6 +150,10 @@ int GetTrayConstant(TrayConstant constant) {
       return kTrayPopupItemMinStartWidth[mode];
     case TRAY_POPUP_ITEM_MIN_END_WIDTH:
       return kTrayPopupItemMinEndWidth[mode];
+    case TRAY_POPUP_TRANSITION_TO_DEFAULT_DELAY:
+      return kTrayPopupTransitionToDefaultViewDelayMs[mode];
+    case TRAY_POPUP_TRANSITION_TO_DETAILED_DELAY:
+      return kTrayPopupTransitionToDetailedViewDelayMs[mode];
     case VIRTUAL_KEYBOARD_BUTTON_SIZE:
       return kVirtualKeyboardButtonSize[mode];
     case TRAY_IME_MENU_ICON: