Move the Widget hierarchy to the Oilpan heap.

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/rendering/RenderBox.h"
 #include "core/rendering/RenderView.h"
 
 namespace blink {
 
 FrameViewAutoSizeInfo::FrameViewAutoSizeInfo(FrameView* view)
     : m_frameView(view)
     , m_inAutoSize(false)
     , m_didRunAutosize(false)
 {
     ASSERT(m_frameView);
 }
 
-FrameViewAutoSizeInfo::~FrameViewAutoSizeInfo()
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(FrameViewAutoSizeInfo);
+
+void FrameViewAutoSizeInfo::trace(Visitor* visitor)
 {
-    removeAutoSizeMode();
+    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;
     m_maxAutoSize = maxSize;
     m_didRunAutosize = false;
 
     m_frameView->setLayoutSizeFixedToFrameSize(true);
     m_frameView->setNeedsLayout();
     m_frameView->scheduleRelayout();
 }
 
-void FrameViewAutoSizeInfo::removeAutoSizeMode()
-{
-    m_frameView->setLayoutSizeFixedToFrameSize(false);
-    m_frameView->setNeedsLayout();
-    m_frameView->scheduleRelayout();
-
-    // Since autosize mode forces the scrollbar mode, change them to being auto.
-    m_frameView->setVerticalScrollbarLock(false);
-    m_frameView->setHorizontalScrollbarLock(false);
-    m_frameView->setScrollbarModes(ScrollbarAuto, ScrollbarAuto);
-}
-
 void FrameViewAutoSizeInfo::autoSizeIfNeeded()
 {
     if (m_inAutoSize)
         return;
 
     TemporaryChange<bool> changeInAutoSize(m_inAutoSize, true);
 
     Document* document = m_frameView->frame().document();
     if (!document || !document->isActive())
         return;
@@ skipping 26 matching lines @@
             return;
 
         int height = documentRenderBox->scrollHeight();
         IntSize newSize(width, height);
 
         // Check to see if a scrollbar is needed for a given dimension and
         // if so, increase the other dimension to account for the scrollbar.
         // Since the dimensions are only for the view rectangle, once a
         // dimension exceeds the maximum, there is no need to increase it further.
         if (newSize.width() > m_maxAutoSize.width()) {
-            RefPtr<Scrollbar> localHorizontalScrollbar = m_frameView->horizontalScrollbar();
+            RefPtrWillBeRawPtr<Scrollbar> localHorizontalScrollbar = m_frameView->horizontalScrollbar();
             if (!localHorizontalScrollbar)
                 localHorizontalScrollbar = m_frameView->createScrollbar(HorizontalScrollbar);
             if (!localHorizontalScrollbar->isOverlayScrollbar())
                 newSize.setHeight(newSize.height() + localHorizontalScrollbar->height());
 
             // Don't bother checking for a vertical scrollbar because the width is at
             // already greater the maximum.
         } else if (newSize.height() > m_maxAutoSize.height()) {
-            RefPtr<Scrollbar> localVerticalScrollbar = m_frameView->verticalScrollbar();
+            RefPtrWillBeRawPtr<Scrollbar> localVerticalScrollbar = m_frameView->verticalScrollbar();
             if (!localVerticalScrollbar)
                 localVerticalScrollbar = m_frameView->createScrollbar(VerticalScrollbar);
             if (!localVerticalScrollbar->isOverlayScrollbar())
                 newSize.setWidth(newSize.width() + localVerticalScrollbar->width());
 
             // Don't bother checking for a horizontal scrollbar because the height is
             // already greater the maximum.
         }
 
         // Ensure the size is at least the min bounds.
@@ skipping 24 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