Fix unreplied automation messages that trigger DCHECK

chrome/browser/automation/testing_automation_provider.cc

Index: chrome/browser/automation/testing_automation_provider.cc
diff --git a/chrome/browser/automation/testing_automation_provider.cc b/chrome/browser/automation/testing_automation_provider.cc
index bd75e2eefcd467aeb363420d976e3d5330052466..215a4801747734634fca561c0ef65d9c5f6a2299 100644
--- a/chrome/browser/automation/testing_automation_provider.cc
+++ b/chrome/browser/automation/testing_automation_provider.cc
@@ -2598,17 +2598,17 @@ void TestingAutomationProvider::WaitForDownloadsToComplete(
     Browser* browser,
     DictionaryValue* args,
     IPC::Message* reply_message) {
-  AutomationJSONReply reply(this, reply_message);
 
   // Look for a quick return.
   if (!profile_->HasCreatedDownloadManager()) {
-    reply.SendSuccess(NULL);  // No download manager.
+    // No download manager.
+    AutomationJSONReply(this, reply_message).SendSuccess(NULL);
     return;
   }
   std::vector<DownloadItem*> downloads;
   profile_->GetDownloadManager()->GetCurrentDownloads(FilePath(), &downloads);
   if (downloads.empty()) {
-    reply.SendSuccess(NULL);
+    AutomationJSONReply(this, reply_message).SendSuccess(NULL);
     return;
   }