Oilpan: hold onto MediaQueryEvaluator singletons with Persistents.

third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp

Index: third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp b/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
index 52b293d1bdd440c070ba08959b2c8e92a9b705b2..18ba58984796f5d3acb34b5da28ad571275c78ab 100644
--- a/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
+++ b/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
@@ -51,14 +51,14 @@ CSSDefaultStyleSheets& CSSDefaultStyleSheets::instance()
 
 static const MediaQueryEvaluator& screenEval()
 {
-    DEFINE_STATIC_LOCAL(const MediaQueryEvaluator, staticScreenEval, ("screen"));
-    return staticScreenEval;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<MediaQueryEvaluator>, staticScreenEval, (adoptPtrWillBeNoop (new MediaQueryEvaluator("screen"))));
+    return *staticScreenEval;
 }
 
 static const MediaQueryEvaluator& printEval()
 {
-    DEFINE_STATIC_LOCAL(const MediaQueryEvaluator, staticPrintEval, ("print"));
-    return staticPrintEval;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<MediaQueryEvaluator>, staticPrintEval, (adoptPtrWillBeNoop (new MediaQueryEvaluator("print"))));
+    return *staticPrintEval;
 }
 
 static PassRefPtrWillBeRawPtr<StyleSheetContents> parseUASheet(const String& str)