Remove stylesheet injection from Blink.

Source/core/dom/StyleEngine.h

 /*
  * 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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 60 matching lines @@
     ~StyleEngine();
 
 #if !ENABLE(OILPAN)
     void detachFromDocument();
 #endif
 
     const WillBeHeapVector<RefPtrWillBeMember<StyleSheet>>& styleSheetsForStyleSheetList(TreeScope&);
     const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet>>& activeAuthorStyleSheets() const;
 
     const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet>>& documentAuthorStyleSheets() const { return m_authorStyleSheets; }
-    const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet>>& injectedAuthorStyleSheets() const;
 
     const WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet>> activeStyleSheetsForInspector() const;
 
     void modifiedStyleSheet(StyleSheet*);
     void addStyleSheetCandidateNode(Node*, bool createdByParser);
     void removeStyleSheetCandidateNode(Node*);
     void removeStyleSheetCandidateNode(Node*, TreeScope&);
     void modifiedStyleSheetCandidateNode(Node*);
     void setExitTransitionStylesheetsEnabled(bool);
 
-    void invalidateInjectedStyleSheetCache();
-    void updateInjectedStyleSheetCache() const;
-
-    void compatibilityModeChanged();
-
     void addAuthorSheet(PassRefPtrWillBeRawPtr<StyleSheetContents> authorSheet);
 
     void clearMediaQueryRuleSetStyleSheets();
     void updateStyleSheetsInImport(DocumentStyleSheetCollector& parentCollector);
     void updateActiveStyleSheets(StyleResolverUpdateMode);
 
     String preferredStylesheetSetName() const { return m_preferredStylesheetSetName; }
     String selectedStylesheetSetName() const { return m_selectedStylesheetSetName; }
     void setPreferredStylesheetSetName(const String& name) { m_preferredStylesheetSetName = name; }
     void setSelectedStylesheetSetName(const String& name) { m_selectedStylesheetSetName = name; }
@@ skipping 153 matching lines @@
 
     RawPtrWillBeMember<Document> m_document;
     bool m_isMaster;
 
     // Track the number of currently loading top-level stylesheets needed for rendering.
     // Sheets loaded using the @import directive are not included in this count.
     // We use this count of pending sheets to detect when we can begin attaching
     // elements and when it is safe to execute scripts.
     int m_pendingStylesheets;
 
-    mutable WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet>> m_injectedAuthorStyleSheets;
-    mutable bool m_injectedStyleSheetCacheValid;
-
     WillBeHeapVector<RefPtrWillBeMember<CSSStyleSheet>> m_authorStyleSheets;
 
     OwnPtrWillBeMember<DocumentStyleSheetCollection> m_documentStyleSheetCollection;
 
     typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<TreeScope>, OwnPtrWillBeMember<ShadowTreeStyleSheetCollection>> StyleSheetCollectionMap;
     StyleSheetCollectionMap m_styleSheetCollectionMap;
 
     bool m_documentScopeDirty;
     UnorderedTreeScopeSet m_dirtyTreeScopes;
     OrderedTreeScopeSet m_activeTreeScopes;
@@ skipping 14 matching lines @@
 
     RefPtrWillBeMember<CSSFontSelector> m_fontSelector;
 
     WillBeHeapHashMap<AtomicString, RawPtrWillBeMember<StyleSheetContents>> m_textToSheetCache;
     WillBeHeapHashMap<RawPtrWillBeMember<StyleSheetContents>, AtomicString> m_sheetToTextCache;
 };
 
 }
 
 #endif