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

ui/gfx/native_widget_types.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_GFX_NATIVE_WIDGET_TYPES_H_
 #define UI_GFX_NATIVE_WIDGET_TYPES_H_
 #pragma once
 
 #include "base/basictypes.h"
-#include "build/build_config.h"
+#include "ui/ui_api.h"
 
 // This file provides cross platform typedefs for native widget types.
 //   NativeWindow: this is a handle to a native, top-level window
 //   NativeView: this is a handle to a native UI element. It may be the
 //     same type as a NativeWindow on some platforms.
 //   NativeViewId: Often, in our cross process model, we need to pass around a
 //     reference to a "window". This reference will, say, be echoed back from a
 //     renderer to the browser when it wishes to query its size. On Windows we
 //     use an HWND for this.
 //
@@ skipping 119 matching lines @@
 #endif  // defined(OS_POSIX)
 
 // Convert a NativeView to a NativeViewId.  See the comments at the top of
 // this file.
 #if defined(OS_WIN) || defined(OS_MACOSX)
 static inline NativeViewId IdFromNativeView(NativeView view) {
   return reinterpret_cast<NativeViewId>(view);
 }
 #elif defined(USE_X11)
 // Not inlined because it involves pulling too many headers.
-NativeViewId IdFromNativeView(NativeView view);
+UI_API NativeViewId IdFromNativeView(NativeView view);
 #endif  // defined(USE_X11)
 
 
 // PluginWindowHandle is an abstraction wrapping "the types of windows
 // used by NPAPI plugins".  On Windows it's an HWND, on X it's an X
 // window id.
 #if defined(OS_WIN)
   typedef HWND PluginWindowHandle;
   const PluginWindowHandle kNullPluginWindow = NULL;
 #elif defined(USE_X11)
@@ skipping 22 matching lines @@
 typedef unsigned long AcceleratedWidget;
 const AcceleratedWidget kNullAcceleratedWidget = 0;
 #else
 typedef void* AcceleratedWidget;
 const AcceleratedWidget kNullAcceleratedWidget = NULL;
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_WIDGET_TYPES_H_