Invalidate first line display item clients when first line style changes

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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 282 matching lines @@
     void flipForWritingMode(LayoutRect&) const;
     LayoutPoint flipForWritingMode(const LayoutPoint&) const;
 
     bool knownToHaveNoOverflow() const { return m_bitfields.knownToHaveNoOverflow(); }
     void clearKnownToHaveNoOverflow();
 
     bool dirOverride() const { return m_bitfields.dirOverride(); }
     void setDirOverride(bool dirOverride) { m_bitfields.setDirOverride(dirOverride); }
 
     DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
+    void invalidateDisplayItemClientsRecursively();

[chrishtr, 2015/12/03 18:41:56]

It's not super clear how far this recursion goes. For box subtree? A comment
would also help.

[Xianzhu, 2015/12/03 19:10:40]

Acknowledged.

[mstensho (USE GERRIT), 2015/12/03 19:58:02]

Why this change now? I don't recall having seen anyone request it in this
review. I think it was better the way it was in the previous patch set. It
carries out a very specific task, and doesn't deserve more than a static
function (that's what it used to be). No need to make it look like an API that
someone would want to call, IMHO. :)

[Xianzhu, 2015/12/03 20:34:55]

I'm also working on crbug.com/563943 and found this will be needed by it.

[mstensho (USE GERRIT), 2015/12/03 20:41:57]

OK, fair enough. Then ignore me, but chrishtr has a point about commenting this,
though. :)

[Xianzhu, 2015/12/03 22:47:05]

Done.

 
 #define ADD_BOOLEAN_BITFIELD(name, Name) \
     private:\
     unsigned m_##name : 1;\
     public:\
     bool name() const { return m_##name; }\
     void set##Name(bool name) { m_##name = name; }\
 
     class InlineBoxBitfields {
         DISALLOW_NEW();
@@ skipping 137 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