Reduce risk of MediaQueryEvaluator-induced leaks.

third_party/WebKit/Source/core/inspector/InspectorCSSAgent.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 1284 matching lines @@
         break;
     }
 
     const MediaQuerySet* queries = media->queries();
     const WillBeHeapVector<OwnPtrWillBeMember<MediaQuery> >& queryVector = queries->queryVector();
     LocalFrame* frame = nullptr;
     if (parentStyleSheet) {
         if (Document* document = parentStyleSheet->ownerDocument())
             frame = document->frame();
     }
-    OwnPtr<MediaQueryEvaluator> mediaEvaluator = adoptPtr(new MediaQueryEvaluator(frame));
+    OwnPtrWillBeRawPtr<MediaQueryEvaluator> mediaEvaluator = adoptPtrWillBeNoop(new MediaQueryEvaluator(frame));
 
     InspectorStyleSheet* inspectorStyleSheet = parentStyleSheet ? m_cssStyleSheetToInspectorStyleSheet.get(parentStyleSheet) : nullptr;
     RefPtr<TypeBuilder::Array<TypeBuilder::CSS::MediaQuery> > mediaListArray = TypeBuilder::Array<TypeBuilder::CSS::MediaQuery>::create();
     RefPtrWillBeRawPtr<MediaValues> mediaValues = MediaValues::createDynamicIfFrameExists(frame);
     bool hasMediaQueryItems = false;
     for (size_t i = 0; i < queryVector.size(); ++i) {
         MediaQuery* query = queryVector.at(i).get();
         const ExpressionHeapVector& expressions = query->expressions();
         RefPtr<TypeBuilder::Array<TypeBuilder::CSS::MediaQueryExpression> > expressionArray = TypeBuilder::Array<TypeBuilder::CSS::MediaQueryExpression>::create();
         bool hasExpressionItems = false;
@@ skipping 686 matching lines @@
     visitor->trace(m_documentToCSSStyleSheets);
     visitor->trace(m_invalidatedDocuments);
     visitor->trace(m_nodeToInspectorStyleSheet);
     visitor->trace(m_documentToViaInspectorStyleSheet);
 #endif
     visitor->trace(m_inspectorUserAgentStyleSheet);
     InspectorBaseAgent::trace(visitor);
 }
 
 } // namespace blink