Remove assorted unnecessary includes in core/layout/

third_party/WebKit/Source/core/layout/LayoutThemeDefault.cpp

 /*
  * Copyright (C) 2007 Apple Inc.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Collabora Ltd.
  * Copyright (C) 2008, 2009 Google Inc.
  * Copyright (C) 2009 Kenneth Rohde Christiansen
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "core/layout/LayoutThemeDefault.h"
 
 #include "core/CSSValueKeywords.h"
-#include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutThemeFontProvider.h"
 #include "core/paint/MediaControlsPainter.h"
+#include "core/style/ComputedStyle.h"
 #include "platform/LayoutTestSupport.h"
 #include "platform/PlatformResourceLoader.h"
 #include "platform/graphics/Color.h"
-#include "platform/scroll/ScrollbarTheme.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebThemeEngine.h"
+#include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 enum PaddingType {
     TopPadding,
     RightPadding,
     BottomPadding,
     LeftPadding
 };
 
@@ skipping 352 matching lines @@
 {
     return progressAnimationInterval;
 }
 
 double LayoutThemeDefault::animationDurationForProgressBar() const
 {
     return progressAnimationInterval * progressAnimationFrames * 2; // "2" for back and forth
 }
 
 } // namespace blink