Oilpan: fix build after r187965.

Source/core/css/parser/CSSParserImpl.cpp

 // Copyright 2014 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 "config.h"
 #include "core/css/parser/CSSParserImpl.h"
 
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StylePropertySet.h"
@@ skipping 291 matching lines @@
     if (nameToken.type() == IdentToken) {
         name = nameToken.value();
     } else if (nameToken.type() == StringToken && webkitPrefixed) {
         if (m_context.useCounter())
             m_context.useCounter()->count(UseCounter::QuotedKeyframesRule);
         name = nameToken.value();
     } else {
         return nullptr; // Parse error; expected ident token in @keyframes header
     }
 
-    const Vector<RefPtrWillBeMember<StyleRuleBase>>& keyframeRules = consumeRuleList(block, KeyframesRuleList);
+    const WillBeHeapVector<RefPtrWillBeMember<StyleRuleBase>>& keyframeRules = consumeRuleList(block, KeyframesRuleList);
 
     RefPtrWillBeRawPtr<StyleRuleKeyframes> rule = StyleRuleKeyframes::create();
     for (const auto& keyframe : keyframeRules)
         rule->parserAppendKeyframe(toStyleRuleKeyframe(keyframe.get()));
     rule->setName(name);
     rule->setVendorPrefixed(webkitPrefixed);
     return rule.release();
 }
 
 PassRefPtrWillBeRawPtr<StyleRuleKeyframe> CSSParserImpl::consumeKeyframeStyleRule(CSSParserTokenRange prelude, CSSParserTokenRange block)
@@ skipping 98 matching lines @@
         else
             return nullptr; // Parser error, invalid value in keyframe selector
         if (range.atEnd())
             return result.release();
         if (range.consume().type() != CommaToken)
             return nullptr; // Parser error
     }
 }
 
 } // namespace blink