Bug 1219296 - Fix an include-what-you-use error. r=kats

MozReview-Commit-ID: KBizLnMEXG4

--HG--
extra : rebase_source : 045f571e67b8a1046cbc1c98e9ab2f7716964a96

layout/generic/nsRubyTextContainerFrame.cpp

@@ -10,6 +10,7 @@
 
 #include "mozilla/UniquePtr.h"
 #include "mozilla/WritingModes.h"
+#include "nsLineLayout.h"
 #include "nsPresContext.h"
 #include "nsStyleContext.h"