aura: Update how the tooltip manager works.

views/widget/native_widget_aura.h

Index: views/widget/native_widget_aura.h
diff --git a/views/widget/native_widget_aura.h b/views/widget/native_widget_aura.h
index 046255270ea20e2a7b41e602e98c843f4e629c60..63f51d6be5b8262aa5e26b9cdf3a2e7671573d46 100644
--- a/views/widget/native_widget_aura.h
+++ b/views/widget/native_widget_aura.h
@@ -22,6 +22,8 @@ class Font;
 
 namespace views {
 
+class TooltipManagerViews;
+
 class VIEWS_EXPORT NativeWidgetAura : public internal::NativeWidgetPrivate,
                                       public aura::WindowDelegate {
  public:
@@ -158,7 +160,7 @@ class VIEWS_EXPORT NativeWidgetAura : public internal::NativeWidgetPrivate,
 
   gfx::NativeCursor cursor_;
 
-  scoped_ptr<TooltipManager> tooltip_manager_;
+  scoped_ptr<TooltipManagerViews> tooltip_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetAura);
 };