Move wm/core to wm namespace.

ash/accelerators/accelerator_filter.cc

Index: ash/accelerators/accelerator_filter.cc
diff --git a/ash/accelerators/accelerator_filter.cc b/ash/accelerators/accelerator_filter.cc
index 64fe9a606422c2ba1bd54923b8cd6dd52122d843..da552b9326f7a9610cf7e286043a6034ad882786 100644
--- a/ash/accelerators/accelerator_filter.cc
+++ b/ash/accelerators/accelerator_filter.cc
@@ -47,7 +47,7 @@ bool IsSystemKey(ui::KeyboardCode key_code) {
 bool CanConsumeSystemKeys(aura::Window* target) {
   if (!target)  // Can be NULL in tests.
     return false;
-  aura::Window* top_level = views::corewm::GetToplevelWindow(target);
+  aura::Window* top_level = ::wm::GetToplevelWindow(target);
   return top_level && wm::GetWindowState(top_level)->can_consume_system_keys();
 }