Rename UI_API to UI_EXPORT.

ui/base/ui_export.h

Index: ui/base/ui_export.h
===================================================================
--- ui/base/ui_export.h	(revision 95583)
+++ ui/base/ui_export.h	(working copy)
@@ -2,28 +2,28 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_UI_API_H_
-#define UI_UI_API_H_
+#ifndef UI_UI_EXPORT_H_
+#define UI_UI_EXPORT_H_
 #pragma once
 
-// Defines UI_API so that funtionality implemented by the UI module can be
+// Defines UI_EXPORT so that functionality implemented by the UI module can be
 // exported to consumers.
 
 #if defined(COMPONENT_BUILD)
 #if defined(WIN32)
 
 #if defined(UI_IMPLEMENTATION)
-#define UI_API __declspec(dllexport)
+#define UI_EXPORT __declspec(dllexport)
 #else
-#define UI_API __declspec(dllimport)
+#define UI_EXPORT __declspec(dllimport)
 #endif  // defined(UI_IMPLEMENTATION)
 
 #else  // defined(WIN32)
-#define UI_API __attribute__((visibility("default")))
+#define UI_EXPORT __attribute__((visibility("default")))
 #endif
 
-#else  /// defined(COMPONENT_BUILD)
-#define UI_API
+#else  // defined(COMPONENT_BUILD)
+#define UI_EXPORT
 #endif
 
-#endif  // UI_UI_API_H_
+#endif  // UI_UI_EXPORT_H_