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

third_party/WebKit/Source/core/paint/ObjectPaintInvalidator.cpp

 // Copyright 2016 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.
 
 #include "core/paint/ObjectPaintInvalidator.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutBlockFlow.h"
+#include "core/layout/LayoutView.h"
+#include "core/layout/api/LayoutPartItem.h"
 #include "core/layout/compositing/CompositedLayerMapping.h"
 #include "core/paint/PaintInvalidator.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/HostWindow.h"
 #include "platform/graphics/GraphicsLayer.h"
 
 namespace blink {
 
 static bool gDisablePaintInvalidationStateAsserts = false;
 
@@ skipping 451 matching lines @@
     m_object.invalidateDisplayItemClients(reason);
     return reason;
 }
 
 DisablePaintInvalidationStateAsserts::DisablePaintInvalidationStateAsserts()
     : m_disabler(&gDisablePaintInvalidationStateAsserts, true)
 {
 }
 
 } // namespace blink