Merge 94991 - <rdar://problem/10054615> Floats in ruby text intrude into the base

Source/WebCore/rendering/RenderRubyText.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple 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.
@@ skipping 74 matching lines @@
 {
     // RenderRubyText manages its own :before and :after content
     // and is not handled by its anonymous wrappers RenderRubyRun
     // and RenderRuby. This contrasts with other ruby children, which
     // are enclosed in RenderRubyBase and hence they are able to
     // update their :before, :after content (since RenderRubyBase
     // is not a anonymous wrapper).
     return children()->updateBeforeAfterContent(this, pseudoId);
 }
 
+bool RenderRubyText::avoidsFloats() const
+{
+    return true;
+}
+
 } // namespace WebCore