Fix use-after-scope in SharedStyleFinderTest.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/resolver/SharedStyleFinder.h"
 
 #include "core/css/RuleFeature.h"
 #include "core/css/RuleSet.h"
 #include "core/css/parser/CSSParser.h"
 #include "core/dom/Document.h"
@@ skipping 50 matching lines @@
         for (auto ruleFeature : ruleFeatures)
             ruleSet->addRule(ruleFeature.rule, ruleFeature.selectorIndex, RuleHasNoSpecialState);
         return ruleSet;
     }
 
     bool matchesRuleSet(Element& element, RuleSet* ruleSet)
     {
         if (!ruleSet)
             return false;
 
-        SharedStyleFinder finder(ElementResolveContext(element),
+        ElementResolveContext context(element);
+        SharedStyleFinder finder(context,
             m_ruleSet->features(),
             m_siblingRuleSet,
             m_uncommonAttributeRuleSet,
             document().ensureStyleResolver());
 
         return finder.matchesRuleSet(ruleSet);
     }
 
     std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
     Persistent<RuleSet> m_ruleSet;
@@ skipping 101 matching lines @@
     ASSERT_TRUE(b);
 
     EXPECT_FALSE(a->isDragged());
     EXPECT_FALSE(b->isDragged());
 
     EXPECT_TRUE(matchesUncommonAttributeRuleSet(*a));
     EXPECT_FALSE(matchesUncommonAttributeRuleSet(*b));
 }
 
 } // namespace blink