Mising JS refactoring in XFA.

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1463973002 .
diff --git a/fpdfsdk/include/jsapi/fxjs_v8.h b/fpdfsdk/include/jsapi/fxjs_v8.h
index 3b5e6af..8263cd4 100644
--- a/fpdfsdk/include/jsapi/fxjs_v8.h
+++ b/fpdfsdk/include/jsapi/fxjs_v8.h
@@ -136,13 +136,13 @@
                          v8::Global<v8::Context>* pV8PersistentContext,
                          std::vector<v8::Global<v8::Object>*>* pStaticObjects);
 
+IJS_Runtime* FXJS_GetRuntimeFromIsolate(v8::Isolate* pIsolate);
+
 // Called as part of FXJS_InitializeRuntime, exposed so PDF can make its
 // own contexts compatible with XFA or vice versa.
 void FXJS_SetRuntimeForV8Context(v8::Local<v8::Context> v8Context,
                                  IJS_Runtime* pIRuntime);
 
-IJS_Runtime* FXJS_GetRuntimeFromV8Context(v8::Local<v8::Context> v8Context);
-
 // Called after FXJS_InitializeRuntime call made.
 int FXJS_Execute(v8::Isolate* pIsolate,
                  IJS_Context* pJSContext,