Fix typos that meant to say handler instead of hander.

Change-Id: I60f556f107f740b854237bc89184b09e4f1d2585
Reviewed-on: https://pdfium-review.googlesource.com/6790
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
diff --git a/fpdfsdk/cpdfsdk_formfillenvironment.h b/fpdfsdk/cpdfsdk_formfillenvironment.h
index 73e3bdd..b1e095a 100644
--- a/fpdfsdk/cpdfsdk_formfillenvironment.h
+++ b/fpdfsdk/cpdfsdk_formfillenvironment.h
@@ -210,7 +210,7 @@
   CFFL_InteractiveFormFiller* GetInteractiveFormFiller();
   CPDFSDK_AnnotHandlerMgr* GetAnnotHandlerMgr();  // Creates if not present.
   IJS_Runtime* GetJSRuntime();                    // Creates if not present.
-  CPDFSDK_ActionHandler* GetActionHander();       // Creates if not present.
+  CPDFSDK_ActionHandler* GetActionHandler();      // Creates if not present.
   CPDFSDK_InterForm* GetInterForm();              // Creates if not present.
 
  private: