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

third_party/WebKit/Source/modules/csspaint/PaintWorklet.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 "modules/csspaint/PaintWorklet.h"
 
 #include "bindings/core/v8/V8Binding.h"
+#include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/csspaint/PaintWorkletGlobalScope.h"
 
 namespace blink {
 
 // static
 PaintWorklet* PaintWorklet::create(LocalFrame* frame)
 {
     PaintWorklet* worklet = new PaintWorklet(frame);
     worklet->suspendIfNeeded();
@@ skipping 25 matching lines @@
     return m_paintWorkletGlobalScope->addPendingGenerator(name, generator);
 }
 
 DEFINE_TRACE(PaintWorklet)
 {
     visitor->trace(m_paintWorkletGlobalScope);
     Worklet::trace(visitor);
 }
 
 } // namespace blink