Refactors DockedWindowLayoutManager in terms of ash/wm/common

chrome/browser/ui/ash/chrome_launcher_prefs.h

Index: chrome/browser/ui/ash/chrome_launcher_prefs.h
diff --git a/chrome/browser/ui/ash/chrome_launcher_prefs.h b/chrome/browser/ui/ash/chrome_launcher_prefs.h
index 2210f1e047041b1355bcf37e6f94c349aa0db9ce..de6fe245bb91cc6597c6f1b211a90a7884399eb0 100644
--- a/chrome/browser/ui/ash/chrome_launcher_prefs.h
+++ b/chrome/browser/ui/ash/chrome_launcher_prefs.h
@@ -49,10 +49,11 @@ void SetShelfAutoHideBehaviorPref(PrefService* prefs,
                                   ShelfAutoHideBehavior behavior);
 
 // Get or set the shelf alignment preference for a root window.
-ShelfAlignment GetShelfAlignmentPref(PrefService* prefs, int64_t display_id);
+wm::ShelfAlignment GetShelfAlignmentPref(PrefService* prefs,
+                                         int64_t display_id);
 void SetShelfAlignmentPref(PrefService* prefs,
                            int64_t display_id,
-                           ShelfAlignment alignment);
+                           wm::ShelfAlignment alignment);
 
 }  // namespace ash