Move Frame to the Oilpan heap.

Source/core/frame/Frame.cpp

Index: Source/core/frame/Frame.cpp
diff --git a/Source/core/frame/Frame.cpp b/Source/core/frame/Frame.cpp
index f647b3e5988b5ed202236a17a12183a39112612d..f1becba59eaa117bf99fd668489c93fcbd2f35a9 100644
--- a/Source/core/frame/Frame.cpp
+++ b/Source/core/frame/Frame.cpp
@@ -81,26 +81,37 @@ Frame::Frame(FrameClient* client, FrameHost* host, FrameOwner* owner)
 
 Frame::~Frame()
 {
+    // FIXME: We should not be doing all this work inside the destructor
+#if !ENABLE(OILPAN)
     disconnectOwnerElement();
     setDOMWindow(nullptr);
-
-    // FIXME: We should not be doing all this work inside the destructor
+#endif
 
 #ifndef NDEBUG
     frameCounter.decrement();
 #endif
 }
 
+void Frame::trace(Visitor* visitor)
+{
+    visitor->trace(m_treeNode);
+    visitor->trace(m_host);
+    visitor->trace(m_owner);
+    visitor->trace(m_domWindow);
+}
+
 void Frame::detachChildren()
 {
-    typedef Vector<RefPtr<Frame> > FrameVector;
+    typedef WillBeHeapVector<RefPtrWillBeMember<Frame> > FrameVector;
     FrameVector childrenToDetach;
     childrenToDetach.reserveCapacity(tree().childCount());
     for (Frame* child = tree().firstChild(); child; child = child->tree().nextSibling())
         childrenToDetach.append(child);
     FrameVector::iterator end = childrenToDetach.end();
-    for (FrameVector::iterator it = childrenToDetach.begin(); it != end; ++it)
+    for (FrameVector::iterator it = childrenToDetach.begin(); it != end; ++it) {
         (*it)->detach();
+        (*it)->disconnectOwnerElement();
+    }
 }
 
 FrameHost* Frame::host() const
@@ -126,6 +137,7 @@ void Frame::setDOMWindow(PassRefPtrWillBeRawPtr<LocalDOMWindow> domWindow)
 {
     if (m_domWindow)
         m_domWindow->reset();
+
     m_domWindow = domWindow;
 }
 
@@ -158,7 +170,7 @@ RenderPart* Frame::ownerRenderer() const
     return toRenderPart(object);
 }
 
-void Frame::setRemotePlatformLayer(blink::WebLayer* layer)
+void Frame::setRemotePlatformLayer(WebLayer* layer)
 {
     if (m_remotePlatformLayer)
         GraphicsLayer::unregisterContentsLayer(m_remotePlatformLayer);
@@ -197,7 +209,7 @@ void Frame::disconnectOwnerElement()
         if (page())
             page()->decrementSubframeCount();
     }
-    m_owner = 0;
+    m_owner = nullptr;
 }
 
 HTMLFrameOwnerElement* Frame::deprecatedLocalOwner() const