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

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

 // Copyright 2014 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/LayerClipRecorder.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/api/LayoutAPIShim.h"
+#include "core/layout/api/LayoutViewItem.h"
 #include "core/layout/compositing/PaintLayerCompositor.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/PaintController.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 namespace {
@@ skipping 59 matching lines @@
     GraphicsContext context(rootPaintController());
     EXPECT_EQ((size_t)0, rootPaintController().getDisplayItemList().size());
 
     drawEmptyClip(context, layoutView(), PaintPhaseForeground);
     rootPaintController().commitNewDisplayItems();
     EXPECT_EQ((size_t)0, rootPaintController().getDisplayItemList().size());
 }
 
 } // namespace
 } // namespace blink