Make code compile with clang_use_chrome_plugin (part IV)

fpdfsdk/javascript/JS_Value.cpp

Index: fpdfsdk/javascript/JS_Value.cpp
diff --git a/fpdfsdk/javascript/JS_Value.cpp b/fpdfsdk/javascript/JS_Value.cpp
index 1b8964bd00ed51b910cf521dfdb1865af006b269..53d6d598334febc6a0faf5d7fcb0d65df51cee92 100644
--- a/fpdfsdk/javascript/JS_Value.cpp
+++ b/fpdfsdk/javascript/JS_Value.cpp
@@ -82,6 +82,8 @@ CJS_Value::CJS_Value(CJS_Runtime* pRuntime, CJS_Array& array)
 
 CJS_Value::~CJS_Value() {}
 
+CJS_Value::CJS_Value(const CJS_Value& other) = default;
+
 void CJS_Value::Attach(v8::Local<v8::Value> pValue, Type t) {
   m_pValue = pValue;
   m_eType = t;
@@ -410,6 +412,8 @@ CJS_Array::CJS_Array(CJS_Runtime* pRuntime) : m_pJSRuntime(pRuntime) {}
 
 CJS_Array::~CJS_Array() {}
 
+CJS_Array::CJS_Array(const CJS_Array& other) = default;
+
 void CJS_Array::Attach(v8::Local<v8::Array> pArray) {
   m_pArray = pArray;
 }