Only create widgets if really needed.

fpdfsdk/javascript/Field.h

 // 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
 
 #ifndef FPDFSDK_JAVASCRIPT_FIELD_H_
 #define FPDFSDK_JAVASCRIPT_FIELD_H_
 
 #include <string>
@@ skipping 407 matching lines @@
                               FX_BOOL bChangeMark,
                               FX_BOOL bResetAP,
                               FX_BOOL bRefresh);
   static void UpdateFormControl(CPDFSDK_Document* pDocument,
                                 CPDF_FormControl* pFormControl,
                                 FX_BOOL bChangeMark,
                                 FX_BOOL bResetAP,
                                 FX_BOOL bRefresh);
 
   static CPDFSDK_Widget* GetWidget(CPDFSDK_Document* pDocument,
-                                   CPDF_FormControl* pFormControl);
+                                   CPDF_FormControl* pFormControl,
+                                   bool createIfNeeded);
   static std::vector<CPDF_FormField*> GetFormFields(
       CPDFSDK_Document* pDocument,
       const CFX_WideString& csFieldName);
 
   static void DoDelay(CPDFSDK_Document* pDocument, CJS_DelayData* pData);
 
   FX_BOOL AttachField(Document* pDocument, const CFX_WideString& csFieldName);
   void SetDelay(FX_BOOL bDelay);
   void SetIsolate(v8::Isolate* isolate) { m_isolate = isolate; }
 
@@ skipping 112 matching lines @@
   JS_STATIC_METHOD(setLock, Field);
   JS_STATIC_METHOD(signatureGetModifications, Field);
   JS_STATIC_METHOD(signatureGetSeedValue, Field);
   JS_STATIC_METHOD(signatureInfo, Field);
   JS_STATIC_METHOD(signatureSetSeedValue, Field);
   JS_STATIC_METHOD(signatureSign, Field);
   JS_STATIC_METHOD(signatureValidate, Field);
 };
 
 #endif  // FPDFSDK_JAVASCRIPT_FIELD_H_