Revert: Only create widgets if really needed

This CL reverts ef523dd36aea991084b8b934df846014a5c09c6f which causes issues
with syncing of form fields over pages.

The initial bug had follow on fixes which seem to have rendered this fix
un-needed.

BUG=chromium:632709, chromium:661294

Review-Url: https://codereview.chromium.org/2473103003
diff --git a/fpdfsdk/javascript/Field.h b/fpdfsdk/javascript/Field.h
index d4371ab..f3948ff 100644
--- a/fpdfsdk/javascript/Field.h
+++ b/fpdfsdk/javascript/Field.h
@@ -407,8 +407,7 @@
                                 bool bRefresh);
 
   static CPDFSDK_Widget* GetWidget(CPDFSDK_FormFillEnvironment* pFormFillEnv,
-                                   CPDF_FormControl* pFormControl,
-                                   bool createIfNeeded);
+                                   CPDF_FormControl* pFormControl);
   static std::vector<CPDF_FormField*> GetFormFields(
       CPDFSDK_FormFillEnvironment* pFormFillEnv,
       const CFX_WideString& csFieldName);