Oilpan: move ClientRect and its list to the oilpan heap.

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index cf9582d5fec6d6b48e4731d52b0b824dbd017fd2..1f8f9f3be77828975e2bf524813a4134367d8667 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -833,7 +833,7 @@ IntRect Element::boundsInRootViewSpace()
     return result;
 }
 
-PassRefPtr<ClientRectList> Element::getClientRects()
+PassRefPtrWillBeRawPtr<ClientRectList> Element::getClientRects()
 {
     document().updateLayoutIgnorePendingStylesheets();
 
@@ -850,7 +850,7 @@ PassRefPtr<ClientRectList> Element::getClientRects()
     return ClientRectList::create(quads);
 }
 
-PassRefPtr<ClientRect> Element::getBoundingClientRect()
+PassRefPtrWillBeRawPtr<ClientRect> Element::getBoundingClientRect()
 {
     document().updateLayoutIgnorePendingStylesheets();