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

ui/base/x/x11_util_internal.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_X_X11_UTIL_INTERNAL_H_
 #define UI_BASE_X_X11_UTIL_INTERNAL_H_
 #pragma once
 
 // This file declares utility functions for X11 (Linux only).
 //
 // These functions require the inclusion of the Xlib headers. Since the Xlib
 // headers pollute so much of the namespace, this should only be included
 // when needed.
 
 extern "C" {
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <X11/extensions/XShm.h>
 #include <X11/extensions/Xrender.h>
 }
 
+#include "ui/ui_api.h"
+
 namespace ui {
 
-  // --------------------------------------------------------------------------
-  // NOTE: these functions cache the results and must be called from the UI
-  // thread.
-  // Get the XRENDER format id for ARGB32 (Skia's format).
-  //
-  // NOTE:Currently this don't support multiple screens/displays.
-  XRenderPictFormat* GetRenderARGB32Format(Display* dpy);
+// --------------------------------------------------------------------------
+// NOTE: these functions cache the results and must be called from the UI
+// thread.
+// Get the XRENDER format id for ARGB32 (Skia's format).
+//
+// NOTE:Currently this don't support multiple screens/displays.
+XRenderPictFormat* GetRenderARGB32Format(Display* dpy);
 
-  // Get the XRENDER format id for the default visual on the first screen. This
-  // is the format which our GTK window will have.
-  XRenderPictFormat* GetRenderVisualFormat(Display* dpy, Visual* visual);
+// Get the XRENDER format id for the default visual on the first screen. This
+// is the format which our GTK window will have.
+UI_API XRenderPictFormat* GetRenderVisualFormat(Display* dpy, Visual* visual);
 
-  // --------------------------------------------------------------------------
-  // X11 error handling.
-  // Sets the X Error Handlers. Passing NULL for either will enable the default
-  // error handler, which if called will log the error and abort the process.
-  void SetX11ErrorHandlers(XErrorHandler error_handler,
-                           XIOErrorHandler io_error_handler);
+// --------------------------------------------------------------------------
+// X11 error handling.
+// Sets the X Error Handlers. Passing NULL for either will enable the default
+// error handler, which if called will log the error and abort the process.
+UI_API void SetX11ErrorHandlers(XErrorHandler error_handler,
+                                XIOErrorHandler io_error_handler);
 
-  // NOTE: This function should not be called directly from the
-  // X11 Error handler because it queries the server to decode the
-  // error message, which may trigger other errors. A suitable workaround
-  // is to post a task in the error handler to call this function.
-  void LogErrorEventDescription(Display* dpy, const XErrorEvent& error_event);
+// NOTE: This function should not be called directly from the
+// X11 Error handler because it queries the server to decode the
+// error message, which may trigger other errors. A suitable workaround
+// is to post a task in the error handler to call this function.
+UI_API void LogErrorEventDescription(Display* dpy,
+                                     const XErrorEvent& error_event);
 
 }  // namespace ui
 
 #endif  // UI_BASE_X_X11_UTIL_INTERNAL_H_