[WeakMemoryCache 1a] Make Reference from Inspector to Resource weak, remove removedFromMemoryCache()

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 44 matching lines @@
     return size;
 }
 
 StyleSheetContents::StyleSheetContents(StyleRuleImport* ownerRule, const String& originalURL, const CSSParserContext& context)
     : m_ownerRule(ownerRule)
     , m_originalURL(originalURL)
     , m_defaultNamespace(starAtom)
     , m_hasSyntacticallyValidCSSHeader(true)
     , m_didLoadErrorOccur(false)
     , m_isMutable(false)
-    , m_isInMemoryCache(false)
+    , m_isReferencedFromResource(false)
     , m_hasFontFaceRule(false)
     , m_hasMediaQueries(false)
     , m_hasSingleOwnerDocument(true)
     , m_parserContext(context)
 {
 }
 
 StyleSheetContents::StyleSheetContents(const StyleSheetContents& o)
     : m_ownerRule(nullptr)
     , m_originalURL(o.m_originalURL)
     , m_importRules(o.m_importRules.size())
     , m_namespaceRules(o.m_namespaceRules.size())
     , m_childRules(o.m_childRules.size())
     , m_namespaces(o.m_namespaces)
     , m_defaultNamespace(o.m_defaultNamespace)
     , m_hasSyntacticallyValidCSSHeader(o.m_hasSyntacticallyValidCSSHeader)
     , m_didLoadErrorOccur(false)
     , m_isMutable(false)
-    , m_isInMemoryCache(false)
+    , m_isReferencedFromResource(false)
     , m_hasFontFaceRule(o.m_hasFontFaceRule)
     , m_hasMediaQueries(o.m_hasMediaQueries)
     , m_hasSingleOwnerDocument(true)
     , m_parserContext(o.m_parserContext)
 {
     ASSERT(o.isCacheable());
 
     // FIXME: Copy import rules.
     ASSERT(o.m_importRules.isEmpty());
 
@@ skipping 470 matching lines @@
     m_completedClients.remove(sheet);
     m_loadingClients.add(sheet);
 }
 
 void StyleSheetContents::removeSheetFromCache(Document* document)
 {
     ASSERT(document);
     document->styleEngine().removeSheet(this);
 }
 
-void StyleSheetContents::addedToMemoryCache()
+void StyleSheetContents::setReferencedFromResource(bool referenced)
 {
-    ASSERT(!m_isInMemoryCache);
+    ASSERT(referenced != m_isReferencedFromResource);
     ASSERT(isCacheable());
-    m_isInMemoryCache = true;
-}
-
-void StyleSheetContents::removedFromMemoryCache()
-{
-    ASSERT(isCacheable());
-    m_isInMemoryCache = false;
+    m_isReferencedFromResource = referenced;
 }
 
 RuleSet& StyleSheetContents::ensureRuleSet(const MediaQueryEvaluator& medium, AddRuleFlags addRuleFlags)
 {
     if (!m_ruleSet) {
         m_ruleSet = RuleSet::create();
         m_ruleSet->addRulesFromSheet(this, medium, addRuleFlags);
     }
     return *m_ruleSet.get();
 }
@@ skipping 71 matching lines @@
     visitor->trace(m_ownerRule);
     visitor->trace(m_importRules);
     visitor->trace(m_namespaceRules);
     visitor->trace(m_childRules);
     visitor->trace(m_loadingClients);
     visitor->trace(m_completedClients);
     visitor->trace(m_ruleSet);
 }
 
 } // namespace blink