Oilpan: avoid invoking some no-op finalizers.

Source/core/css/MediaList.cpp

Index: Source/core/css/MediaList.cpp
diff --git a/Source/core/css/MediaList.cpp b/Source/core/css/MediaList.cpp
index 954fb62926850f5d765540c875d5f64e920bc7b8..a67ac677cc53245cce60333a554f9c6e8b78a127 100644
--- a/Source/core/css/MediaList.cpp
+++ b/Source/core/css/MediaList.cpp
@@ -64,7 +64,7 @@ MediaQuerySet::MediaQuerySet(const MediaQuerySet& o)
         m_queries[i] = o.m_queries[i]->copy();
 }
 
-DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQuerySet)
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQuerySet);
 
 PassRefPtrWillBeRawPtr<MediaQuerySet> MediaQuerySet::create(const String& mediaString)
 {
@@ -187,9 +187,7 @@ MediaList::MediaList(MediaQuerySet* mediaQueries, CSSRule* parentRule)
 {
 }
 
-MediaList::~MediaList()
-{
-}
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaList);
 
 void MediaList::setMediaText(const String& value)
 {