[SafeBrowsing] Alternate extensions should also be subject to block list.

chrome/test/ppapi/ppapi_filechooser_browsertest.cc

Index: chrome/test/ppapi/ppapi_filechooser_browsertest.cc
diff --git a/chrome/test/ppapi/ppapi_filechooser_browsertest.cc b/chrome/test/ppapi/ppapi_filechooser_browsertest.cc
index 79c1f13ba470e173d7ceac727d8c4479f997a9cc..181d1096c9e9ccdf52c0ef44222dc7177cd087d0 100644
--- a/chrome/test/ppapi/ppapi_filechooser_browsertest.cc
+++ b/chrome/test/ppapi/ppapi_filechooser_browsertest.cc
@@ -309,6 +309,16 @@ IN_PROC_BROWSER_TEST_F(PPAPIFileChooserTest,
   RunTestViaHTTP("FileChooser_SaveAsDangerousExecutableDisallowed");
 }
 
+IN_PROC_BROWSER_TEST_F(PPAPIFileChooserTest,
+                       FileChooser_SaveAs_DangerousExtensionList_Disallowed) {
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kDisallowUncheckedDangerousDownloads);
+  TestSelectFileDialogFactory test_dialog_factory(
+      TestSelectFileDialogFactory::NOT_REACHED,
+      TestSelectFileDialogFactory::SelectedFileInfoList());
+  RunTestViaHTTP("FileChooser_SaveAsDangerousExtensionListDisallowed");
+}
+
 // The kDisallowUncheckedDangerousDownloads switch (whose behavior is verified
 // by the FileChooser_SaveAs_DangerousExecutable_Disallowed test above) should
 // block the file being downloaded. However, the FakeDatabaseManager reports