Don't include LayoutObject.h from FrameView.h

third_party/WebKit/Source/core/page/scrolling/SnapCoordinatorTest.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 "SnapCoordinator.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/frame/FrameView.h"
+#include "core/html/HTMLElement.h"
 #include "core/style/ComputedStyle.h"
 #include "core/testing/DummyPageHolder.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/testing/RuntimeEnabledFeaturesTestHelpers.h"
 #include <gtest/gtest.h>
 #include <memory>
 
 namespace blink {
 
 using HTMLNames::styleAttr;
@@ skipping 359 matching lines @@
     Vector<double> result = snapOffsets(body, HorizontalScrollbar);
     EXPECT_EQ(5, result[0]);
     EXPECT_EQ(10, result[1]);
     result = snapOffsets(body, VerticalScrollbar);
     EXPECT_EQ(6, result[0]);
     EXPECT_EQ(11, result[1]);
 }
 
 
 } // namespace