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

ui/wm/core/wm_core_export.h

Index: ui/wm/core/wm_core_export.h
diff --git a/ui/wm/core/wm_core_export.h b/ui/wm/core/wm_core_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..2056ccc56823589bd7a857104aabb2b9215b8613
--- /dev/null
+++ b/ui/wm/core/wm_core_export.h
@@ -0,0 +1,32 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_WM_CORE_WM_CORE_EXPORT_H_
+#define UI_WM_CORE_WM_CORE_EXPORT_H_
+
+// Defines WM_CORE_EXPORT so that functionality implemented by the Views module
+// can be exported to consumers.
+
+#if defined(COMPONENT_BUILD)
+#if defined(WIN32)
+
+#if defined(WM_CORE_IMPLEMENTATION)
+#define WM_CORE_EXPORT __declspec(dllexport)
+#else
+#define WM_CORE_EXPORT __declspec(dllimport)
+#endif  // defined(WM_CORE_IMPLEMENTATION)
+
+#else  // defined(WIN32)
+#if defined(WM_CORE_IMPLEMENTATION)
+#define WM_CORE_EXPORT __attribute__((visibility("default")))
+#else
+#define WM_CORE_EXPORT
+#endif
+#endif
+
+#else  // defined(COMPONENT_BUILD)
+#define WM_CORE_EXPORT
+#endif
+
+#endif  // UI_WM_CORE_WM_CORE_EXPORT_H_