InlineFlowBox always has a RenderBoxModelObject, take advantage.
Created attachment 216348 [details]
Attachment 216348 [details] did not pass style-queue:
Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/ChangeLog', u'Source/WebCore/rendering/InlineFlowBox.cpp', u'Source/WebCore/rendering/InlineFlowBox.h', u'Source/WebCore/rendering/RenderListItem.cpp', u'Source/WebCore/rendering/RootInlineBox.cpp']" exit_code: 1
Source/WebCore/rendering/InlineFlowBox.cpp:590: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] 
Total errors found: 1 in 5 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Comment on attachment 216348 [details]
Clearing flags on attachment: 216348
Committed r158894: <http://trac.webkit.org/changeset/158894>
All reviewed patches have been landed. Closing bug.