Leak Detector: Add support for ScriptPromise on Blink side

Source/bindings/core/v8/ScriptPromise.h

Index: Source/bindings/core/v8/ScriptPromise.h
diff --git a/Source/bindings/core/v8/ScriptPromise.h b/Source/bindings/core/v8/ScriptPromise.h
index ff77ee04794079333926a4d4132616d6ceed9e14..a19373560caed8d69fbb147fa6e72597a487f887 100644
--- a/Source/bindings/core/v8/ScriptPromise.h
+++ b/Source/bindings/core/v8/ScriptPromise.h
@@ -50,12 +50,16 @@ class DOMException;
 class CORE_EXPORT ScriptPromise final {
 public:
     // Constructs an empty promise.
-    ScriptPromise() { }
+    ScriptPromise();
 
     // Constructs a ScriptPromise from |promise|.
     // If |promise| is not a Promise object, throws a v8 TypeError.
     ScriptPromise(ScriptState*, v8::Local<v8::Value> promise);
 
+    ScriptPromise(const ScriptPromise&);
+
+    ~ScriptPromise();
+
     ScriptPromise then(v8::Local<v8::Function> onFulfilled, v8::Local<v8::Function> onRejected = v8::Local<v8::Function>());
 
     bool isObject() const
@@ -127,6 +131,8 @@ public:
 
     static v8::Local<v8::Promise> rejectRaw(ScriptState*, v8::Local<v8::Value>);
 
+    static unsigned instanceCount() { return s_instanceCount; }
+
     // This is a utility class intended to be used internally.
     // ScriptPromiseResolver is for general purpose.
     class CORE_EXPORT InternalResolver final {
@@ -145,6 +151,8 @@ public:
 private:
     RefPtr<ScriptState> m_scriptState;
     ScriptValue m_promise;
+
+    static unsigned s_instanceCount;
 };
 
 } // namespace blink