Don't include headers from the layout API from other headers needlessly.

third_party/WebKit/Source/core/editing/CaretBase.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #include "core/editing/CaretBase.h"
 
 #include "core/editing/EditingUtilities.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/api/LayoutBlockItem.h"
 #include "core/layout/api/LayoutItem.h"
+#include "core/layout/api/LayoutViewItem.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/DrawingRecorder.h"
 
 namespace blink {
 
 CaretBase::CaretBase(CaretVisibility visibility)
     : m_caretVisibility(visibility)
@@ skipping 182 matching lines @@
 {
     return "Caret";
 }
 
 LayoutRect CaretBase::visualRect() const
 {
     return m_visualRect;
 }
 
 } // namespace blink