Move MediaQuery classes off BlinkGC heap

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights
  * reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 14 matching lines @@
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/Document.h"
 #include "core/loader/resource/CSSStyleSheetResource.h"
 #include "platform/loader/fetch/FetchInitiatorTypeNames.h"
 #include "platform/loader/fetch/FetchParameters.h"
 #include "platform/loader/fetch/ResourceFetcher.h"
 
 namespace blink {
 
 StyleRuleImport* StyleRuleImport::Create(const String& href,
-                                         MediaQuerySet* media) {
+                                         RefPtr<MediaQuerySet> media) {
   return new StyleRuleImport(href, media);
 }
 
-StyleRuleImport::StyleRuleImport(const String& href, MediaQuerySet* media)
+StyleRuleImport::StyleRuleImport(const String& href,
+                                 RefPtr<MediaQuerySet> media)
     : StyleRuleBase(kImport),
       parent_style_sheet_(nullptr),
       style_sheet_client_(new ImportedStyleSheetClient(this)),
       str_href_(href),
       media_queries_(media),
       loading_(false) {
   if (!media_queries_)
     media_queries_ = MediaQuerySet::Create(String());
 }
 
 StyleRuleImport::~StyleRuleImport() {}
 
 void StyleRuleImport::Dispose() {
   if (resource_)
     resource_->RemoveClient(style_sheet_client_);
   resource_ = nullptr;
 }
 
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleImport) {
   visitor->Trace(style_sheet_client_);
   visitor->Trace(parent_style_sheet_);
-  visitor->Trace(media_queries_);
   visitor->Trace(style_sheet_);
   visitor->Trace(resource_);
   StyleRuleBase::TraceAfterDispatch(visitor);
 }
 
 void StyleRuleImport::SetCSSStyleSheet(
     const String& href,
     const KURL& base_url,
     ReferrerPolicy referrer_policy,
     const String& charset,
@@ skipping 67 matching lines @@
     // the sheet being imported is pending.
     if (parent_style_sheet_ && parent_style_sheet_->LoadCompleted() &&
         root_sheet == parent_style_sheet_)
       parent_style_sheet_->StartLoadingDynamicSheet();
     loading_ = true;
     resource_->AddClient(style_sheet_client_);
   }
 }
 
 }  // namespace blink