Fix incorrect v8 TryCatch.

fpdfsdk/javascript/JS_Value.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "fpdfsdk/javascript/JS_Value.h"
 
 #include <time.h>
 
@@ skipping 133 matching lines @@
 
 void CJS_Value::MaybeCoerceToNumber() {
   bool bAllowNaN = false;
   if (m_eType == VT_string) {
     CFX_ByteString bstr = ToCFXByteString();
     if (bstr.GetLength() == 0)
       return;
     if (bstr == "NaN")
       bAllowNaN = true;
   }
-  v8::TryCatch(m_pJSRuntime->GetIsolate());
+  v8::TryCatch try_catch(m_pJSRuntime->GetIsolate());
   v8::MaybeLocal<v8::Number> maybeNum =
       m_pValue->ToNumber(m_pJSRuntime->GetIsolate()->GetCurrentContext());
   if (maybeNum.IsEmpty())
     return;
   v8::Local<v8::Number> num = maybeNum.ToLocalChecked();
   if (std::isnan(num->Value()) && !bAllowNaN)
     return;
   m_pValue = num;
   m_eType = VT_number;
 }
@@ skipping 728 matching lines @@
   for (size_t i = 0; i < nKeywords; ++i) {
     const wchar_t* property = va_arg(ap, const wchar_t*);
     v8::Local<v8::Value> v8Value =
         FXJS_GetObjectElement(pRuntime->GetIsolate(), pObj, property);
     if (!v8Value->IsUndefined())
       result[i] = CJS_Value(pRuntime, v8Value, CJS_Value::VT_unknown);
   }
   va_end(ap);
   return result;
 }