Invalidate first line display item clients when first line style changes

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 3094 matching lines @@
 
     FrameView* frameView = document().view();
     LayoutUnit top = (style()->position() == FixedPosition) ? 0 : frameView->scrollOffset().height();
     int visibleHeight = frameView->visibleContentRect(IncludeScrollbars).height();
     if (size().height() < visibleHeight)
         top += (visibleHeight - size().height()) / 2;
     setY(top);
     dialog->setCentered(top);
 }
 
+static void invalidateDisplayItemClientsOfInlineBoxRecursively(InlineBox& box)

[mstensho (USE GERRIT), 2015/12/03 12:08:10]

All of this should go into LayoutBlockFlowLine.cpp, since we have that
implementation separation.

[Xianzhu, 2015/12/03 17:38:22]

Done.

+{
+    box.layoutObject().invalidateDisplayItemClient(box);
+    if (!box.isInlineFlowBox())
+        return;
+    for (InlineBox* child = toInlineFlowBox(box).firstChild(); child; child = child->nextOnLine())

[mstensho (USE GERRIT), 2015/12/03 12:08:10]

@eae: can you comment on this, please? I don't know the line code well enough.

+        invalidateDisplayItemClientsOfInlineBoxRecursively(*child);
+}
+
+void LayoutBlockFlow::invalidateDisplayItemClientsOfFirstLine()
+{
+    ASSERT(childrenInline());
+    if (RootInlineBox* firstRootBox = this->firstRootBox())
+        invalidateDisplayItemClientsOfInlineBoxRecursively(*firstRootBox);
+}
+
 } // namespace blink