views::Separator cleanup.

ash/common/system/tray/tray_background_view.cc

Index: ash/common/system/tray/tray_background_view.cc
diff --git a/ash/common/system/tray/tray_background_view.cc b/ash/common/system/tray/tray_background_view.cc
index e5aef5a48faa937c5f314537e99c548adb4dc0aa..074a94b64fa040f42c7ef1b6c8992e99e195a4d2 100644
--- a/ash/common/system/tray/tray_background_view.cc
+++ b/ash/common/system/tray/tray_background_view.cc
@@ -586,10 +586,10 @@ void TrayBackgroundView::OnPaint(gfx::Canvas* canvas) {
       !separator_visible_) {
     return;
   }
-  //  In the given |canvas|, for a horizontal shelf draw a separator line to the
-  //  right or left of the TrayBackgroundView when the system is LTR or RTL
-  //  aligned, respectively. For a vertical shelf draw the separator line
-  //  underneath the items instead.
+  // In the given |canvas|, for a horizontal shelf draw a separator line to the
+  // right or left of the TrayBackgroundView when the system is LTR or RTL
+  // aligned, respectively. For a vertical shelf draw the separator line
+  // underneath the items instead.
   const bool horizontal_shelf = IsHorizontalAlignment(shelf_alignment_);
   const gfx::Rect local_bounds = GetLocalBounds();
   const int height = kTrayItemSize;
@@ -601,7 +601,7 @@ void TrayBackgroundView::OnPaint(gfx::Canvas* canvas) {
   gfx::ScopedCanvas scoped_canvas(canvas);
   const float scale = canvas->UndoDeviceScaleFactor();
   cc::PaintFlags paint;
-  paint.setColor(kSeparatorColor);
+  paint.setColor(kTraySeparatorColor);
   paint.setAntiAlias(true);
 
   const gfx::Rect bounds = horizontal_shelf