Implemented system tray UI for new account management.

ash/system/tray/hover_highlight_view.h

Index: ash/system/tray/hover_highlight_view.h
diff --git a/ash/system/tray/hover_highlight_view.h b/ash/system/tray/hover_highlight_view.h
index 0ca9358f4674bd6755ff906062a40170c36fb2c9..fa7d6b4cde61c069733df2e7fc756ed8de084804 100644
--- a/ash/system/tray/hover_highlight_view.h
+++ b/ash/system/tray/hover_highlight_view.h
@@ -9,6 +9,7 @@
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/gfx/font.h"
+#include "ui/gfx/text_constants.h"
 
 namespace views {
 class Label;
@@ -37,6 +38,7 @@ class HoverHighlightView : public ActionableView {
   // blank icon.  This also sets the accessible name.
   // Returns label after parenting it.
   views::Label* AddLabel(const base::string16& text,
+                         gfx::HorizontalAlignment alignment,
                          gfx::Font::FontStyle style);
 
   // Convenience function for adding an optional check and a label.  In the