Some views GTK fixes.

chrome/browser/views/tabs/dragged_tab_view.h

 // Copyright (c) 2006-2008 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 CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_VIEW_H_
 #define CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_VIEW_H_
 
 #include "app/slide_animation.h"
 #include "base/gfx/point.h"
 #include "base/gfx/size.h"
 #include "base/task.h"
+#include "build/build_config.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "views/view.h"
 
 namespace views {
+#if defined(OS_WIN)
 class WidgetWin;
+#elif defined(OS_LINUX)
+class WidgetGtk;
+#endif
 }
 namespace gfx {
 class Point;
 }
 class NativeViewPhotobooth;
 class Tab;
 class TabContents;
 class TabRenderer;
 
 class DraggedTabView : public views::View,
@@ skipping 90 matching lines @@
   scoped_ptr<Callback0::Type> animation_callback_;
 
   // The start and end bounds of the animation sequence.
   gfx::Rect animation_start_bounds_;
   gfx::Rect animation_end_bounds_;
 
   DISALLOW_EVIL_CONSTRUCTORS(DraggedTabView);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_TABS_DRAGGED_TAB_VIEW_H_