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 2983f41dbe741f4a1b151734ca8f62d6e017dc3c..a7c54731453b06e8a79e903dfbffff67458591bb 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();