Split IPWL_SystemHandler and fxcrt::TimerHandlerIface

Change-Id: I62a69d51d8544cb75da9f5e82a105cfcfab54f58
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/58953
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/fxjs/cjs_runtime.cpp b/fxjs/cjs_runtime.cpp
index 1cded27..4cb37dd 100644
--- a/fxjs/cjs_runtime.cpp
+++ b/fxjs/cjs_runtime.cpp
@@ -143,7 +143,7 @@
 }
 
 TimerHandlerIface* CJS_Runtime::GetTimerHandler() const {
-  return m_pFormFillEnv ? m_pFormFillEnv->GetSysHandler() : nullptr;
+  return m_pFormFillEnv ? m_pFormFillEnv->GetTimerHandler() : nullptr;
 }
 
 void CJS_Runtime::SetFormFillEnvToDocument() {