Remove unused V8 integration code in Sky

sky/engine/bindings/core/v8/V8PersistentValueMap.h

Index: sky/engine/bindings/core/v8/V8PersistentValueMap.h
diff --git a/sky/engine/bindings/core/v8/V8PersistentValueMap.h b/sky/engine/bindings/core/v8/V8PersistentValueMap.h
deleted file mode 100644
index 2a600a44f8bd24f0cc3d2f13f733b4560c27d8c8..0000000000000000000000000000000000000000
--- a/sky/engine/bindings/core/v8/V8PersistentValueMap.h
+++ /dev/null
@@ -1,129 +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 SKY_ENGINE_BINDINGS_CORE_V8_V8PERSISTENTVALUEMAP_H_
-#define SKY_ENGINE_BINDINGS_CORE_V8_V8PERSISTENTVALUEMAP_H_
-
-#include "sky/engine/wtf/HashMap.h"
-#include "sky/engine/wtf/text/StringHash.h"
-#include "v8/include/v8-util.h"
-#include "v8/include/v8.h"
-
-namespace blink {
-
-/**
- * A Traits class for v8::PersistentValueMap that uses wtf/HashMap as a
- * backing store.
- *
- * The parameter is_weak will determine whether the references are 'weak'.
- * If so, entries will be removed from the map as the weak references are
- * collected.
- */
-template<class KeyType, class ValueType, bool is_weak>
-class V8PersistentValueMapTraits {
-public:
-    // Map traits:
-    typedef HashMap<KeyType, v8::PersistentContainerValue> Impl;
-    typedef typename Impl::iterator Iterator;
-    static size_t Size(const Impl* impl) { return impl->size(); }
-    static bool Empty(Impl* impl) { return impl->isEmpty(); }
-    static void Swap(Impl& impl, Impl& other) { impl.swap(other); }
-    static Iterator Begin(Impl* impl) { return impl->begin(); }
-    static Iterator End(Impl* impl) { return impl->end(); }
-    static v8::PersistentContainerValue Value(Iterator& iter)
-    {
-        return iter->value;
-    }
-    static KeyType Key(Iterator& iter) { return iter->key; }
-    static v8::PersistentContainerValue Set(
-        Impl* impl, KeyType key, v8::PersistentContainerValue value)
-    {
-        v8::PersistentContainerValue oldValue = Get(impl, key);
-        impl->set(key, value);
-        return oldValue;
-    }
-    static v8::PersistentContainerValue Get(const Impl* impl, KeyType key)
-    {
-        return impl->get(key);
-    }
-
-    static v8::PersistentContainerValue Remove(Impl* impl, KeyType key)
-    {
-        return impl->take(key);
-    }
-
-    // Weak traits:
-    static const v8::PersistentContainerCallbackType kCallbackType = is_weak ? v8::kWeak : v8::kNotWeak;
-    typedef v8::PersistentValueMap<KeyType, ValueType, V8PersistentValueMapTraits<KeyType, ValueType, is_weak> > MapType;
-
-    typedef void WeakCallbackDataType;
-
-    static WeakCallbackDataType* WeakCallbackParameter(MapType* map, KeyType key, const v8::Local<ValueType>& value)
-    {
-        return 0;
-    }
-
-    static void DisposeCallbackData(WeakCallbackDataType* callbackData)
-    {
-    }
-
-    static MapType* MapFromWeakCallbackData(
-        const v8::WeakCallbackData<ValueType, WeakCallbackDataType>& data)
-    {
-        return 0;
-    }
-
-    static KeyType KeyFromWeakCallbackData(
-        const v8::WeakCallbackData<ValueType, WeakCallbackDataType>& data)
-    {
-        return KeyType();
-    }
-
-    // Dispose traits:
-    static void Dispose(v8::Isolate* isolate, v8::UniquePersistent<ValueType> value, KeyType key) { }
-};
-
-/**
- * A map for safely storing persistent V8 values, based on
- * v8::PersistentValueMap.
- *
- * If is_weak is set, values will be held weakly and map entries will be
- * removed as their values are being collected.
- */
-template<class KeyType, class ValueType, bool is_weak = true>
-class V8PersistentValueMap : public v8::PersistentValueMap<KeyType, ValueType, V8PersistentValueMapTraits<KeyType, ValueType, is_weak> > {
-public:
-    typedef V8PersistentValueMapTraits<KeyType, ValueType, is_weak> Traits;
-    explicit V8PersistentValueMap(v8::Isolate* isolate) : v8::PersistentValueMap<KeyType, ValueType, Traits>(isolate) { }
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_BINDINGS_CORE_V8_V8PERSISTENTVALUEMAP_H_