Remove unused V8 integration code in Sky

sky/engine/bindings/core/v8/custom/V8MutationObserverCustom.cpp

Index: sky/engine/bindings/core/v8/custom/V8MutationObserverCustom.cpp
diff --git a/sky/engine/bindings/core/v8/custom/V8MutationObserverCustom.cpp b/sky/engine/bindings/core/v8/custom/V8MutationObserverCustom.cpp
deleted file mode 100644
index fa5f1bea81161a1804f47f7b8db66fbb1b1b0bcf..0000000000000000000000000000000000000000
--- a/sky/engine/bindings/core/v8/custom/V8MutationObserverCustom.cpp
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2011 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.
- */
-
-#include "sky/engine/config.h"
-#include "bindings/core/v8/V8MutationObserver.h"
-
-#include "sky/engine/bindings/core/v8/ExceptionMessages.h"
-#include "sky/engine/bindings/core/v8/ExceptionState.h"
-#include "sky/engine/bindings/core/v8/V8Binding.h"
-#include "sky/engine/bindings/core/v8/V8DOMWrapper.h"
-#include "sky/engine/bindings/core/v8/V8GCController.h"
-#include "sky/engine/bindings/core/v8/V8MutationCallback.h"
-#include "sky/engine/core/dom/MutationObserver.h"
-#include "sky/engine/core/dom/Node.h"
-
-namespace blink {
-
-void V8MutationObserver::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
-{
-    ExceptionState exceptionState(ExceptionState::ConstructionContext, "MutationObserver", info.Holder(), info.GetIsolate());
-    if (info.Length() < 1) {
-        exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
-        exceptionState.throwIfNeeded();
-        return;
-    }
-
-    v8::Local<v8::Value> arg = info[0];
-    if (!arg->IsFunction()) {
-        exceptionState.throwTypeError("Callback argument must be a function");
-        exceptionState.throwIfNeeded();
-        return;
-    }
-
-    v8::Handle<v8::Object> wrapper = info.Holder();
-
-    OwnPtr<MutationCallback> callback = V8MutationCallback::create(v8::Handle<v8::Function>::Cast(arg), wrapper, ScriptState::current(info.GetIsolate()));
-    RefPtr<MutationObserver> observer = MutationObserver::create(callback.release());
-
-    V8DOMWrapper::associateObjectWithWrapper<V8MutationObserver>(observer.release(), &wrapperTypeInfo, wrapper, info.GetIsolate());
-    info.GetReturnValue().Set(wrapper);
-}
-
-void V8MutationObserver::visitDOMWrapper(ScriptWrappableBase* internalPointer, const v8::Persistent<v8::Object>& wrapper, v8::Isolate* isolate)
-{
-    MutationObserver* observer = fromInternalPointer(internalPointer);
-    HashSet<RawPtr<Node> > observedNodes = observer->getObservedNodes();
-    for (HashSet<RawPtr<Node> >::iterator it = observedNodes.begin(); it != observedNodes.end(); ++it) {
-        v8::UniqueId id(reinterpret_cast<intptr_t>(V8GCController::opaqueRootForGC(*it, isolate)));
-        isolate->SetReferenceFromGroup(id, wrapper);
-    }
-}
-
-} // namespace blink