Remove StyleInvalidator machinery.

sky/engine/core/css/invalidation/DescendantInvalidationSet.h

Index: sky/engine/core/css/invalidation/DescendantInvalidationSet.h
diff --git a/sky/engine/core/css/invalidation/DescendantInvalidationSet.h b/sky/engine/core/css/invalidation/DescendantInvalidationSet.h
deleted file mode 100644
index 3e86a09c3786825cbbfdd49d690ce772ef125095..0000000000000000000000000000000000000000
--- a/sky/engine/core/css/invalidation/DescendantInvalidationSet.h
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * Copyright (C) 2014 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:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef DescendantInvalidationSet_h
-#define DescendantInvalidationSet_h
-
-#include "platform/heap/Handle.h"
-#include "wtf/Forward.h"
-#include "wtf/HashSet.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
-#include "wtf/text/AtomicStringHash.h"
-#include "wtf/text/StringHash.h"
-
-namespace blink {
-
-class Element;
-
-// Tracks data to determine which elements of a DOM subtree need to have style
-// recalculated.
-class DescendantInvalidationSet final : public RefCounted<DescendantInvalidationSet> {
-public:
-    static PassRefPtr<DescendantInvalidationSet> create()
-    {
-        return adoptRef(new DescendantInvalidationSet);
-    }
-
-    bool invalidatesElement(Element&) const;
-
-    void combine(const DescendantInvalidationSet& other);
-
-    void addClass(const AtomicString& className);
-    void addId(const AtomicString& id);
-    void addTagName(const AtomicString& tagName);
-    void addAttribute(const AtomicString& attributeLocalName);
-
-    void setWholeSubtreeInvalid();
-    bool wholeSubtreeInvalid() const { return m_allDescendantsMightBeInvalid; }
-
-    void setTreeBoundaryCrossing() { m_treeBoundaryCrossing = true; }
-    bool treeBoundaryCrossing() const { return m_treeBoundaryCrossing; }
-
-    void setCustomPseudoInvalid() { m_customPseudoInvalid = true; }
-    bool customPseudoInvalid() const { return m_customPseudoInvalid; }
-
-    bool isEmpty() const { return !m_classes && !m_ids && !m_tagNames && !m_attributes; }
-
-    void trace(Visitor*);
-
-#ifndef NDEBUG
-    void show() const;
-#endif
-
-private:
-    DescendantInvalidationSet();
-
-    HashSet<AtomicString>& ensureClassSet();
-    HashSet<AtomicString>& ensureIdSet();
-    HashSet<AtomicString>& ensureTagNameSet();
-    HashSet<AtomicString>& ensureAttributeSet();
-
-    // FIXME: optimize this if it becomes a memory issue.
-    OwnPtr<HashSet<AtomicString> > m_classes;
-    OwnPtr<HashSet<AtomicString> > m_ids;
-    OwnPtr<HashSet<AtomicString> > m_tagNames;
-    OwnPtr<HashSet<AtomicString> > m_attributes;
-
-    // If true, all descendants might be invalidated, so a full subtree recalc is required.
-    unsigned m_allDescendantsMightBeInvalid : 1;
-
-    // If true, all descendants which are custom pseudo elements must be invalidated.
-    unsigned m_customPseudoInvalid : 1;
-
-    // If true, the invalidation must traverse into ShadowRoots with this set.
-    unsigned m_treeBoundaryCrossing : 1;
-};
-
-} // namespace blink
-
-#endif // DescendantInvalidationSet_h