Move ScriptWrappable and dependencies to platform/bindings

third_party/WebKit/Source/bindings/core/v8/TraceWrapperV8Reference.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef TraceWrapperV8Reference_h
-#define TraceWrapperV8Reference_h
-
-#include "bindings/core/v8/ScriptWrappableVisitor.h"
-
-namespace blink {
-
-/**
- * TraceWrapperV8Reference is used to trace from Blink to V8. If wrapper
- * tracing is disabled, the reference is a weak v8::Persistent. Otherwise,
- * the reference is (strongly) traced by wrapper tracing.
- *
- * TODO(mlippautz): Use a better handle type than v8::Persistent.
- */
-template <typename T>
-class TraceWrapperV8Reference {
- public:
-  explicit TraceWrapperV8Reference(void* parent) : parent_(parent) {}
-
-  TraceWrapperV8Reference(v8::Isolate* isolate,
-                          void* parent,
-                          v8::Local<T> handle)
-      : parent_(parent) {
-    InternalSet(isolate, handle);
-    handle_.SetWeak();
-  }
-
-  ~TraceWrapperV8Reference() { Clear(); }
-
-  void Set(v8::Isolate* isolate, v8::Local<T> handle) {
-    InternalSet(isolate, handle);
-    handle_.SetWeak();
-  }
-
-  template <typename P>
-  void Set(v8::Isolate* isolate,
-           v8::Local<T> handle,
-           P* parameters,
-           void (*callback)(const v8::WeakCallbackInfo<P>&),
-           v8::WeakCallbackType type = v8::WeakCallbackType::kParameter) {
-    InternalSet(isolate, handle);
-    handle_.SetWeak(parameters, callback, type);
-  }
-
-  ALWAYS_INLINE v8::Local<T> NewLocal(v8::Isolate* isolate) const {
-    return v8::Local<T>::New(isolate, handle_);
-  }
-
-  bool IsEmpty() const { return handle_.IsEmpty(); }
-  void Clear() { handle_.Reset(); }
-  ALWAYS_INLINE v8::Persistent<T>& Get() { return handle_; }
-
-  template <typename S>
-  const TraceWrapperV8Reference<S>& Cast() const {
-    return reinterpret_cast<const TraceWrapperV8Reference<S>&>(
-        const_cast<const TraceWrapperV8Reference<T>&>(*this));
-  }
-
- private:
-  inline void InternalSet(v8::Isolate* isolate, v8::Local<T> handle) {
-    handle_.Reset(isolate, handle);
-    ScriptWrappableVisitor::WriteBarrier(isolate, parent_, &Cast<v8::Value>());
-  }
-
-  v8::Persistent<T> handle_;
-  void* parent_;
-};
-
-}  // namespace blink
-
-#endif  // TraceWrapperV8Reference_h
+// This file has been moved to platform/bindings/TraceWrapperV8Reference.h.
+// TODO(adithyas): Remove this file.
+#include "platform/bindings/TraceWrapperV8Reference.h"