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

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 47ae9910c7d9c850b28f43afb450c7d3d225f2d2..912e9748fdf9f87651902710de059bdefde5f1eb 100644
--- a/ui/wm/core/visibility_controller.h
+++ b/ui/wm/core/visibility_controller.h
@@ -8,11 +8,11 @@
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "ui/aura/client/visibility_client.h"
-#include "ui/wm/wm_export.h"
+#include "ui/wm/core/wm_core_export.h"
 
 namespace wm {
 
-class WM_EXPORT VisibilityController
+class WM_CORE_EXPORT VisibilityController
     : public aura::client::VisibilityClient {
  public:
   VisibilityController();
@@ -47,7 +47,7 @@
 //   // previous state.
 // }
 //
-class WM_EXPORT SuspendChildWindowVisibilityAnimations {
+class WM_CORE_EXPORT SuspendChildWindowVisibilityAnimations {
  public:
   // Suspend visibility animations of child windows.
   explicit SuspendChildWindowVisibilityAnimations(aura::Window* window);
@@ -66,7 +66,7 @@
 };
 
 // Tells |window| to animate visibility changes to its children.
-void WM_EXPORT SetChildWindowVisibilityChangesAnimated(
+void WM_CORE_EXPORT SetChildWindowVisibilityChangesAnimated(
     aura::Window* window);
 
 }  // namespace wm