Refactors WindowResizers to use ash/wm/common

ash/system/chromeos/network/tray_network.cc

Index: ash/system/chromeos/network/tray_network.cc
diff --git a/ash/system/chromeos/network/tray_network.cc b/ash/system/chromeos/network/tray_network.cc
index eeb86d5adee46faf66c511c5bd16e3bd129ff852..27c735c7018611cbdb56b7986bbaefe7a8da6511 100644
--- a/ash/system/chromeos/network/tray_network.cc
+++ b/ash/system/chromeos/network/tray_network.cc
@@ -17,6 +17,7 @@
 #include "ash/system/tray/tray_item_more.h"
 #include "ash/system/tray/tray_item_view.h"
 #include "ash/system/tray/tray_utils.h"
+#include "ash/wm/common/shelf/wm_shelf_util.h"
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chromeos/network/network_state.h"
@@ -92,7 +93,7 @@ class NetworkTrayView : public TrayItemView,
   }
 
   void UpdateAlignment(wm::ShelfAlignment alignment) {
-    SetLayoutManager(new views::BoxLayout(IsHorizontalAlignment(alignment)
+    SetLayoutManager(new views::BoxLayout(wm::IsHorizontalAlignment(alignment)
                                               ? views::BoxLayout::kHorizontal
                                               : views::BoxLayout::kVertical,
                                           0, 0, 0));