Make blink classes and structures in core/css fast-allocated

Source/core/css/parser/CSSParserObserverWrapper.h

 // Copyright 2015 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.
 
 #ifndef CSSParserObserverWrapper_h
 #define CSSParserObserverWrapper_h
 
 #include "core/css/parser/CSSParserObserver.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class CSSParserObserverWrapper {
     STACK_ALLOCATED();
 public:
     explicit CSSParserObserverWrapper(CSSParserObserver& observer)
         : m_observer(observer)
     { }
 
@@ skipping 16 matching lines @@
         m_firstParserToken = firstParserToken;
         m_commentIterator = m_commentOffsets.begin();
     }
 
 private:
     CSSParserObserver& m_observer;
     Vector<unsigned> m_tokenOffsets;
     CSSParserToken* m_firstParserToken;
 
     struct CommentPosition {
+        ALLOW_ONLY_INLINE_ALLOCATION();
         unsigned startOffset;
         unsigned endOffset;
         unsigned tokensBefore;
     };
 
     Vector<CommentPosition> m_commentOffsets;
     Vector<CommentPosition>::iterator m_commentIterator;
 };
 
 } // namespace blink
 
 #endif // CSSParserObserverWrapper_h