[Chrome OS MD] Draw a 1px separator between 2 tray items

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 ffd60587606b047ce3c1b348dc08e8d7e7da1e1c..3b636e39b18141e87bf15ad25c7c87a25570587b 100644
--- a/ash/common/system/tray/tray_constants.cc
+++ b/ash/common/system/tray/tray_constants.cc
@@ -87,10 +87,14 @@ const SkColor kTrayIconColor = SK_ColorWHITE;
 const int kMenuIconSize = 20;
 const SkColor kMenuIconColor = SkColorSetRGB(0x5A, 0x5A, 0x5A);
 
+const int kHitRegionPadding = 4;
+const SkColor kSeparatorColor = SkColorSetA(SK_ColorWHITE, 0x3D);
+const int kSeparatorWidth = 1;
+
 int GetTrayConstant(TrayConstant constant) {
   const int kTrayItemHeightLegacy[] = {38, 38, kTrayItemSize};
-  const int kTraySpacing[] = {4, 4, 8};
-  const int kTrayPaddingFromEdgeOfShelf[] = {3, 3, 8};
+  const int kTraySpacing[] = {4, 4, 0};
+  const int kTrayPaddingFromEdgeOfShelf[] = {3, 3, 4};
   const int kVirtualKeyboardButtonSize[] = {39, 39, kTrayItemSize};
 
   const int mode = MaterialDesignController::GetMode();