Replaces ::ui:: with ui:: in ash

ash/mus/screenlock_layout.h

Index: ash/mus/screenlock_layout.h
diff --git a/ash/mus/screenlock_layout.h b/ash/mus/screenlock_layout.h
index 8d645480410f3fe66541655e679aed116a7cdd61..1b43bc685bbf2fb97253a127df19ef9f71a21084 100644
--- a/ash/mus/screenlock_layout.h
+++ b/ash/mus/screenlock_layout.h
@@ -14,12 +14,12 @@ namespace mus {
 // Lays out the shelf within shelf containers.
 class ScreenlockLayout : public LayoutManager {
  public:
-  explicit ScreenlockLayout(::ui::Window* owner);
+  explicit ScreenlockLayout(ui::Window* owner);
   ~ScreenlockLayout() override;
 
  private:
   // Overridden from LayoutManager:
-  void LayoutWindow(::ui::Window* window) override;
+  void LayoutWindow(ui::Window* window) override;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenlockLayout);
 };