Optimize sizeof(InlineBox) by eliminating class layout padding

third_party/WebKit/Source/core/layout/line/InlineBox.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 45 matching lines @@
             LayoutPoint top_left,
             LayoutUnit logical_width,
             bool first_line,
             bool constructed,
             bool dirty,
             bool extracted,
             bool is_horizontal,
             InlineBox* next,
             InlineBox* prev,
             InlineFlowBox* parent)
-      : bitfields_(first_line, constructed, dirty, extracted, is_horizontal),
-        next_(next),
+      : next_(next),
         prev_(prev),
         parent_(parent),
         line_layout_item_(item),
         location_(top_left),
-        logical_width_(logical_width) {}
+        logical_width_(logical_width),
+        bitfields_(first_line, constructed, dirty, extracted, is_horizontal) {}
 
   virtual ~InlineBox();
 
   virtual void Destroy();
 
   virtual void DeleteLine();
   virtual void ExtractLine();
   virtual void AttachLine();
 
   virtual bool IsLineBreak() const { return false; }
@@ skipping 382 matching lines @@
 
    public:
     signed Expansion() const { return expansion_; }
     void SetExpansion(signed expansion) { expansion_ = expansion; }
   };
 #undef ADD_BOOLEAN_BITFIELD
 
  private:
   void SetLineLayoutItemShouldDoFullPaintInvalidationIfNeeded();
 
-  InlineBoxBitfields bitfields_;
-
   InlineBox* next_;  // The next element on the same line as us.
   InlineBox* prev_;  // The previous element on the same line as us.
 
   InlineFlowBox* parent_;  // The box that contains us.
   LineLayoutItem line_layout_item_;
 
  protected:
   // For RootInlineBox
   bool EndsWithBreak() const { return bitfields_.EndsWithBreak(); }
   void SetEndsWithBreak(bool ends_with_break) {
@@ skipping 26 matching lines @@
   signed Expansion() { return bitfields_.Expansion(); }
   void SetExpansion(signed expansion) { bitfields_.SetExpansion(expansion); }
 
   // For InlineFlowBox and InlineTextBox
   bool Extracted() const { return bitfields_.Extracted(); }
 
   LayoutPoint location_;
   LayoutUnit logical_width_;
 
  private:
+  InlineBoxBitfields bitfields_;
+
 #if DCHECK_IS_ON()
   bool has_bad_parent_ = false;
 #endif
 };
 
 #if !DCHECK_IS_ON()
 inline InlineBox::~InlineBox() {}
 #endif
 
 #if DCHECK_IS_ON()
@@ skipping 12 matching lines @@
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::InlineBox*);
 void showLineTree(const blink::InlineBox*);
 #endif
 
 #endif  // InlineBox_h