Oilpan: fix build after r191383 (93780455).

Source/core/frame/FrameViewAutoSizeInfo.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/frame/FrameViewAutoSizeInfo.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/LayoutBox.h"
 #include "core/layout/LayoutView.h"
 
 namespace blink {
 
 FrameViewAutoSizeInfo::FrameViewAutoSizeInfo(FrameView* view)
     : m_frameView(view)
     , m_inAutoSize(false)
     , m_didRunAutosize(false)
 {
     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());
     ASSERT(minSize.width() <= maxSize.width());
     ASSERT(minSize.height() <= maxSize.height());
 
     if (m_minAutoSize == minSize && m_maxAutoSize == maxSize)
         return;
 
     m_minAutoSize = minSize;
@@ skipping 94 matching lines @@
         // Force the scrollbar state to avoid the scrollbar code adding them and causing them to be needed. For example,
         // a vertical scrollbar may cause text to wrap and thus increase the height (which is the only reason the scollbar is needed).
         m_frameView->setVerticalScrollbarLock(false);
         m_frameView->setHorizontalScrollbarLock(false);
         m_frameView->setScrollbarModes(horizonalScrollbarMode, verticalScrollbarMode, true, true);
     }
     m_didRunAutosize = true;
 }
 
 } // namespace blink