Oilpan: fix build after r191383 (93780455).

Source/core/frame/FrameViewAutoSizeInfo.cpp

Index: Source/core/frame/FrameViewAutoSizeInfo.cpp
diff --git a/Source/core/frame/FrameViewAutoSizeInfo.cpp b/Source/core/frame/FrameViewAutoSizeInfo.cpp
index 62f9f50261480968ffb8aeea0b3b70b397e4bcba..9cd53eb40fe182e2aeaccc4cc1b34f8ac618a87b 100644
--- a/Source/core/frame/FrameViewAutoSizeInfo.cpp
+++ b/Source/core/frame/FrameViewAutoSizeInfo.cpp
@@ -20,6 +20,13 @@ FrameViewAutoSizeInfo::FrameViewAutoSizeInfo(FrameView* view)
     ASSERT(m_frameView);
 }
 
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(FrameViewAutoSizeInfo);
+
+DEFINE_TRACE(FrameViewAutoSizeInfo)
+{
+    visitor->trace(m_frameView);
+}
+
 void FrameViewAutoSizeInfo::configureAutoSizeMode(const IntSize& minSize, const IntSize& maxSize)
 {
     ASSERT(!minSize.isEmpty());