Move custom element code to core/dom/custom/

Source/core/dom/CustomElementObserver.h

Index: Source/core/dom/CustomElementObserver.h
diff --git a/Source/core/dom/CustomElementObserver.h b/Source/core/dom/CustomElementObserver.h
deleted file mode 100644
index ab7c57dcee885f9c961b09f811d96a5412df3584..0000000000000000000000000000000000000000
--- a/Source/core/dom/CustomElementObserver.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright (C) 2013 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:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. 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 CustomElementObserver_h
-#define CustomElementObserver_h
-
-#include "wtf/HashMap.h"
-
-namespace WebCore {
-
-class Element;
-
-class CustomElementObserver {
-public:
-    CustomElementObserver() { }
-    virtual ~CustomElementObserver() { }
-
-    // API for CustomElement to kick off notifications
-
-    static void notifyElementDidFinishParsingChildren(Element*);
-    static void notifyElementWasDestroyed(Element*);
-
-protected:
-    void observe(Element*);
-    void unobserve(Element*);
-
-    virtual void elementDidFinishParsingChildren(Element*) = 0;
-    virtual void elementWasDestroyed(Element* element) { unobserve(element); }
-
-private:
-    // Maps elements to the observer watching them. At most one per
-    // element at a time.
-    typedef HashMap<Element*, CustomElementObserver*> ElementObserverMap;
-    static ElementObserverMap& elementObservers();
-};
-
-}
-
-#endif // CustomElementObserver_h