[Chrome OS MD] Update Tray Separator Opacity

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 2cfd4cdb1d18728aa98f6c6d6c1ebca113dc40b0..3db67029fbf6ccb62ef991e422a2acfe3db86ead 100644
--- a/ash/common/system/tray/tray_constants.cc
+++ b/ash/common/system/tray/tray_constants.cc
@@ -86,7 +86,7 @@ const int kMenuSeparatorVerticalPadding = 4;
 const int kMenuExtraMarginFromLeftEdge = 4;
 
 const int kHitRegionPadding = 4;
-const SkColor kSeparatorColor = SkColorSetA(SK_ColorWHITE, 0x4D);
+const SkColor kSeparatorColor = SkColorSetA(SK_ColorWHITE, 0x99);
 const int kSeparatorWidth = 1;
 
 const SkColor kHorizontalSeparatorColor = SkColorSetA(SK_ColorBLACK, 0x1F);