Do not keep InvalidationSets on the Oilpan heap.

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
index 71bf96ea8ac9e1b5c93c32921f727cd7f4d19600..dd1ec1e8d8c81e2fb8b27cf5a7c3c0f4fc475fc0 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
@@ -159,6 +159,10 @@ StyleResolver::StyleResolver(Document& document)
     initWatchedSelectorRules();
 }
 
+StyleResolver::~StyleResolver()
+{
+}
+
 void StyleResolver::initWatchedSelectorRules()
 {
     CSSSelectorWatch* watch = CSSSelectorWatch::fromIfExists(*m_document);
@@ -346,10 +350,6 @@ void StyleResolver::popParentElement(Element& parent)
     m_selectorFilter.popParent(parent);
 }
 
-StyleResolver::~StyleResolver()
-{
-}
-
 static inline ScopedStyleResolver* scopedResolverFor(const Element* element)
 {
     // Ideally, returning element->treeScope().scopedStyleResolver() should be