Introduce ui.dll / libui.so for the component build.

ui/base/l10n/l10n_font_util.h

 // Copyright (c) 2011 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_BASE_L10N_FONT_UTIL_H_
 #define UI_BASE_L10N_FONT_UTIL_H_
 #pragma once
 
 #include "ui/gfx/size.h"
+#include "ui/ui_api.h"
 
 namespace gfx {
 class Font;
 }
 
 namespace ui {
 
 // Returns the preferred size of the contents view of a window based on
 // its localized size data and the given font. The width in cols is held in a
 // localized string resource identified by |col_resource_id|, the height in the
 // same fashion.
-int GetLocalizedContentsWidthForFont(int col_resource_id,
-                                     const gfx::Font& font);
-int GetLocalizedContentsHeightForFont(int row_resource_id,
-                                      const gfx::Font& font);
-gfx::Size GetLocalizedContentsSizeForFont(int col_resource_id,
-                                          int row_resource_id,
-                                          const gfx::Font& font);
+UI_API int GetLocalizedContentsWidthForFont(int col_resource_id,
+                                            const gfx::Font& font);
+UI_API int GetLocalizedContentsHeightForFont(int row_resource_id,
+                                             const gfx::Font& font);
+UI_API gfx::Size GetLocalizedContentsSizeForFont(int col_resource_id,
+                                                 int row_resource_id,
+                                                 const gfx::Font& font);
 
 }  // namespace ui
 
 #endif  // UI_BASE_L10N_FONT_UTIL_H_