Revert of Rename wm_core_export.h to wm_export.h and the wm_core target to just wm

ui/wm/core/native_cursor_manager.h

Index: ui/wm/core/native_cursor_manager.h
diff --git a/ui/wm/core/native_cursor_manager.h b/ui/wm/core/native_cursor_manager.h
index c1da74d5692580b8b0c8dbbce3d718fa2b94eed3..669772889b855746389ef5e7d1796b8f3a6e26c5 100644
--- a/ui/wm/core/native_cursor_manager.h
+++ b/ui/wm/core/native_cursor_manager.h
@@ -7,7 +7,7 @@
 
 #include "base/strings/string16.h"
 #include "ui/wm/core/native_cursor_manager_delegate.h"
-#include "ui/wm/wm_export.h"
+#include "ui/wm/core/wm_core_export.h"
 
 namespace gfx {
 class Display;
@@ -19,7 +19,7 @@
 // requested changes to cursor state. When requested, implementer should tell
 // the CursorManager of any actual state changes performed through the
 // delegate.
-class WM_EXPORT NativeCursorManager {
+class WM_CORE_EXPORT NativeCursorManager {
  public:
   virtual ~NativeCursorManager() {}