Adds emoji/handwriting/vocie buttons on opt-in IME menu.

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 f37ae810be44fd680cc15a8e7de53974d8d4d52b..efb6f3c894b8792b579f3ce0e9e5dd6c630e4690 100644
--- a/ash/common/system/tray/tray_constants.cc
+++ b/ash/common/system/tray/tray_constants.cc
@@ -29,11 +29,6 @@ const int kTrayImageItemHorizontalPaddingBottomAlignment = 1;
 const int kTrayImageItemHorizontalPaddingVerticalAlignment = 1;
 const int kTrayImageItemVerticalPaddingVerticalAlignment = 1;
 
-// Size of IME menu tray.
-const int kTrayImeIconSize = 40;
-const int kTrayImeBottomRowPadding = 5;
-const int kTrayImeBottomRowPaddingBetweenItems = 2;
-
 // Size of tray items on the primary axis.
 const int kTrayItemSize = 32;
 
@@ -99,6 +94,7 @@ int GetTrayConstant(TrayConstant constant) {
   const int kTrayPaddingFromEdgeOfShelf[] = {3, 3, 4};
   const int kTrayPopupItemHeight[] = {46, 46, 48};
   const int kVirtualKeyboardButtonSize[] = {39, 39, kTrayItemSize};
+  const int kTrayImeMenuIcon[] = {40, 40, kTrayItemSize};
 
   const int mode = MaterialDesignController::GetMode();
   DCHECK(mode >= MaterialDesignController::NON_MATERIAL &&
@@ -115,6 +111,8 @@ int GetTrayConstant(TrayConstant constant) {
       return kTrayPopupItemHeight[mode];
     case VIRTUAL_KEYBOARD_BUTTON_SIZE:
       return kVirtualKeyboardButtonSize[mode];
+    case TRAY_IME_MENU_ICON:
+      return kTrayImeMenuIcon[mode];
   }
   NOTREACHED();
   return 0;