[Oilpan]: Move CSSFontSelectorClient to the oilpan heap using transition types.

Source/core/dom/StyleEngine.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 72 matching lines @@
     // Cleanup is performed eagerly when the StyleEngine is removed from the
     // document. The StyleEngine is unreachable after this, since only the
     // document has a reference to it.
     for (unsigned i = 0; i < m_injectedAuthorStyleSheets.size(); ++i)
         m_injectedAuthorStyleSheets[i]->clearOwnerNode();
     for (unsigned i = 0; i < m_authorStyleSheets.size(); ++i)
         m_authorStyleSheets[i]->clearOwnerNode();
 
     if (m_fontSelector) {
         m_fontSelector->clearDocument();
+#if !ENABLE(OILPAN)
         if (m_resolver)
             m_fontSelector->unregisterForInvalidationCallbacks(m_resolver.get());
+#endif
     }
 
     // Decrement reference counts for things we could be keeping alive.
     m_fontSelector.clear();
     m_resolver.clear();
     m_styleSheetCollectionMap.clear();
 }
 
 inline Document* StyleEngine::master()
 {
@@ skipping 335 matching lines @@
 
 void StyleEngine::createResolver()
 {
     // It is a programming error to attempt to resolve style on a Document
     // which is not in a frame. Code which hits this should have checked
     // Document::isActive() before calling into code which could get here.
 
     ASSERT(m_document.frame());
     ASSERT(m_fontSelector);
 
-    m_resolver = adoptPtr(new StyleResolver(m_document));
+    m_resolver = adoptPtrWillBeNoop(new StyleResolver(m_document));
     appendActiveAuthorStyleSheets();
     m_fontSelector->registerForInvalidationCallbacks(m_resolver.get());
     combineCSSFeatureFlags(m_resolver->ensureUpdatedRuleFeatureSet());
 }
 
 void StyleEngine::clearResolver()
 {
     ASSERT(!m_document.inStyleRecalc());
     ASSERT(isMaster() || !m_resolver);
     ASSERT(m_fontSelector || !m_resolver);
     if (m_resolver) {
         m_document.updateStyleInvalidationIfNeeded();
+#if !ENABLE(OILPAN)
         m_fontSelector->unregisterForInvalidationCallbacks(m_resolver.get());
+#endif
     }
     m_resolver.clear();
 }
 
 void StyleEngine::clearMasterResolver()
 {
     if (Document* master = this->master())
         master->styleEngine()->clearResolver();
 }
 
@@ skipping 104 matching lines @@
 
 PassRefPtrWillBeRawPtr<CSSStyleSheet> StyleEngine::createSheet(Element* e, const String& text, TextPosition startPosition, bool createdByParser)
 {
     RefPtrWillBeRawPtr<CSSStyleSheet> styleSheet = nullptr;
 
     e->document().styleEngine()->addPendingSheet();
 
     if (!e->document().inQuirksMode()) {
         AtomicString textContent(text);
 
-        HashMap<AtomicString, StyleSheetContents*>::AddResult result = m_textToSheetCache.add(textContent, 0);
+        WillBeHeapHashMap<AtomicString, RawPtrWillBeMember<StyleSheetContents> >::AddResult result = m_textToSheetCache.add(textContent, nullptr);
         if (result.isNewEntry || !result.storedValue->value) {
             styleSheet = StyleEngine::parseSheet(e, text, startPosition, createdByParser);
             if (result.isNewEntry && isCacheableForStyleElement(*styleSheet->contents())) {
                 result.storedValue->value = styleSheet->contents();
                 m_sheetToTextCache.add(styleSheet->contents(), textContent);
             }
         } else {
             StyleSheetContents* contents = result.storedValue->value;
             ASSERT(contents);
             ASSERT(isCacheableForStyleElement(*contents));
@@ skipping 13 matching lines @@
 PassRefPtrWillBeRawPtr<CSSStyleSheet> StyleEngine::parseSheet(Element* e, const String& text, TextPosition startPosition, bool createdByParser)
 {
     RefPtrWillBeRawPtr<CSSStyleSheet> styleSheet = nullptr;
     styleSheet = CSSStyleSheet::createInline(e, KURL(), startPosition, e->document().inputEncoding());
     styleSheet->contents()->parseStringAtPosition(text, startPosition, createdByParser);
     return styleSheet;
 }
 
 void StyleEngine::removeSheet(StyleSheetContents* contents)
 {
-    HashMap<StyleSheetContents*, AtomicString>::iterator it = m_sheetToTextCache.find(contents);
+    WillBeHeapHashMap<RawPtrWillBeMember<StyleSheetContents>, AtomicString>::iterator it = m_sheetToTextCache.find(contents);
     if (it == m_sheetToTextCache.end())
         return;
 
     m_textToSheetCache.remove(it->value);
     m_sheetToTextCache.remove(contents);
 }
 
 void StyleEngine::trace(Visitor* visitor)
 {
     visitor->trace(m_injectedAuthorStyleSheets);
     visitor->trace(m_authorStyleSheets);
     visitor->trace(m_documentStyleSheetCollection);
     visitor->trace(m_styleSheetCollectionMap);
+    visitor->trace(m_resolver);
+    visitor->trace(m_textToSheetCache);
+    visitor->trace(m_sheetToTextCache);
 }
 
 }