1 files changed, 40 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/bindings/callback_interface_base.cc b/chromium/third_party/blink/renderer/platform/bindings/callback_interface_base.cc
new file mode 100644
index 00000000000..c6d306c3a62
--- /dev/null
+++ b/chromium/third_party/blink/renderer/platform/bindings/callback_interface_base.cc
@@ -0,0 +1,40 @@
+// Copyright 2017 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.
+
+#include "third_party/blink/renderer/platform/bindings/callback_interface_base.h"
+
+namespace blink {
+
+CallbackInterfaceBase::CallbackInterfaceBase(
+    v8::Local<v8::Object> callback_object,
+    SingleOperationOrNot single_op_or_not) {
+  DCHECK(!callback_object.IsEmpty());
+
+  callback_relevant_script_state_ =
+      ScriptState::From(callback_object->CreationContext());
+  v8::Isolate* isolate = callback_relevant_script_state_->GetIsolate();
+
+  callback_object_.Set(isolate, callback_object);
+  is_callback_object_callable_ =
+      (single_op_or_not == kSingleOperation) && callback_object->IsCallable();
+  incumbent_script_state_ = ScriptState::From(isolate->GetIncumbentContext());
+}
+
+void CallbackInterfaceBase::TraceWrappers(
+    const ScriptWrappableVisitor* visitor) const {
+  visitor->TraceWrappers(callback_object_);
+}
+
+V8PersistentCallbackInterfaceBase::V8PersistentCallbackInterfaceBase(
+    CallbackInterfaceBase* callback_interface)
+    : callback_interface_(callback_interface) {
+  v8_object_.Reset(callback_interface_->GetIsolate(),
+                   callback_interface_->callback_object_.Get());
+}
+
+void V8PersistentCallbackInterfaceBase::Trace(blink::Visitor* visitor) {
+  visitor->Trace(callback_interface_);
+}
+
+}  // namespace blink