Move wm/core to wm namespace.

ui/wm/core/visibility_controller.h

Index: ui/wm/core/visibility_controller.h
diff --git a/ui/wm/core/visibility_controller.h b/ui/wm/core/visibility_controller.h
index 3a08aa364c8e445086ffe2c54a601d9493da6ba1..912e9748fdf9f87651902710de059bdefde5f1eb 100644
--- a/ui/wm/core/visibility_controller.h
+++ b/ui/wm/core/visibility_controller.h
@@ -10,8 +10,7 @@
 #include "ui/aura/client/visibility_client.h"
 #include "ui/wm/core/wm_core_export.h"
 
-namespace views {
-namespace corewm {
+namespace wm {
 
 class WM_CORE_EXPORT VisibilityController
     : public aura::client::VisibilityClient {
@@ -70,7 +69,6 @@ class WM_CORE_EXPORT SuspendChildWindowVisibilityAnimations {
 void WM_CORE_EXPORT SetChildWindowVisibilityChangesAnimated(
     aura::Window* window);
 
-}  // namespace corewm
-}  // namespace views
+}  // namespace wm
 
 #endif  // UI_WM_CORE_VISIBILITY_CONTROLLER_H_