Review and cleanup lint warnings.

fpdfsdk/src/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/src/javascript/JS_Value.h"
 
 #include <time.h>
+
 #include <algorithm>
 #include <cmath>
 #include <limits>
+#include <string>
+#include <vector>
 
 #include "fpdfsdk/src/javascript/Document.h"
 #include "fpdfsdk/src/javascript/JS_Define.h"
 #include "fpdfsdk/src/javascript/JS_Object.h"
 
 static const FX_DWORD g_nan[2] = {0, 0x7FF80000};
 static double GetNan() {
   return *(double*)g_nan;
 }
 
@@ skipping 877 matching lines @@
   for (int 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;
 }