Oilpan: fix build after r183913.

Source/core/rendering/RenderTextFragment.cpp

Index: Source/core/rendering/RenderTextFragment.cpp
diff --git a/Source/core/rendering/RenderTextFragment.cpp b/Source/core/rendering/RenderTextFragment.cpp
index d09e24a42a45a63cba1ddb28b7c2ad434a0d5864..bd640c89a748e7a4e90af8562ddf5966f95310c1 100644
--- a/Source/core/rendering/RenderTextFragment.cpp
+++ b/Source/core/rendering/RenderTextFragment.cpp
@@ -53,9 +53,11 @@ RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)
 
 RenderTextFragment::~RenderTextFragment()
 {
+#if !ENABLE(OILPAN)

[esprehn, 2014/10/17 22:02:05]

This is not correct so skip in oilpan, you're leaving bad ptrs to RenderObjects
now since you skip the setRemainingTextRenderer.

[sof, 2014/10/18 04:50:52]

FirstPseudoElement traces its "remaining text renderer" object. How can this
object die without m_firstLetterPseudoElement also dying at the same time?

     if (m_isRemainingTextRenderer && m_firstLetterPseudoElement)
         m_firstLetterPseudoElement->setRemainingTextRenderer(nullptr);
     m_firstLetterPseudoElement = nullptr;
+#endif
 }
 
 void RenderTextFragment::trace(Visitor* visitor)