Move m_lineBoxes and its getters down to LayoutBlockFlow.

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 45 matching lines @@
 #include "core/paint/PaintInfo.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/geometry/TransformState.h"
 #include "platform/text/BidiTextRun.h"
 
 namespace blink {
 
 bool LayoutBlockFlow::s_canPropagateFloatIntoSibling = false;
 
+struct SameSizeAsLayoutBlockFlow : public LayoutBlock {
+    LineBoxList lineBoxes;
+    LayoutUnit m_paintInvalidationLogicalTopAndBottom[2];
+    void* pointers[2];
+};
+
+static_assert(sizeof(LayoutBlockFlow) == sizeof(SameSizeAsLayoutBlockFlow), "LayoutBlockFlow should stay small");
+
 struct SameSizeAsMarginInfo {
     uint16_t bitfields;
     LayoutUnit margins[2];
 };
 
 static_assert(sizeof(LayoutBlockFlow::MarginValues) == sizeof(LayoutUnit[4]), "MarginValues should stay small");
 
 // Caches all our current margin collapsing state.
 class MarginInfo {
     // Collapsing flags for whether we can collapse our margins with our children's margins.
@@ skipping 3770 matching lines @@
             if (!rect.isEmpty())
                 rects.append(rect);
         }
     }
 
     if (inlineElementContinuation)
         inlineElementContinuation->addOutlineRects(rects, additionalOffset + (inlineElementContinuation->containingBlock()->location() - location()), includeBlockOverflows);
 }
 
 } // namespace blink