Move wm/core to wm namespace.

ui/wm/core/shadow_types.h

Index: ui/wm/core/shadow_types.h
diff --git a/ui/wm/core/shadow_types.h b/ui/wm/core/shadow_types.h
index 235b48fc44061d018939c39558be3bc14ce4ebda..49c92fd88d172c36ac65faf006b6ff6cc6faea54 100644
--- a/ui/wm/core/shadow_types.h
+++ b/ui/wm/core/shadow_types.h
@@ -12,8 +12,7 @@ namespace aura {
 class Window;
 }
 
-namespace views {
-namespace corewm {
+namespace wm {
 
 // Different types of drop shadows that can be drawn under a window by the
 // shell.  Used as a value for the kShadowTypeKey property.
@@ -30,7 +29,6 @@ WM_CORE_EXPORT ShadowType GetShadowType(aura::Window* window);
 // window.  If unset, no shadow is displayed.
 extern const aura::WindowProperty<ShadowType>* const kShadowTypeKey;
 
-}  // namespace corewm
-}  // namespace views
+}  // namespace wm
 
 #endif  // UI_WM_CORE_SHADOW_TYPES_H_