Disable DownloadExtensionTest_Download_InvalidURLs on Mac

chrome/browser/extensions/api/downloads/downloads_api_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Disable everything on windows only. http://crbug.com/306144
 #ifndef OS_WIN
 
 #include <algorithm>
 
 #include "base/file_util.h"
@@ skipping 1662 matching lines @@
   GoOnTheRecord();
 
   EXPECT_STREQ(errors::kInvalidFilename,
                 RunFunctionAndReturnError(new DownloadsDownloadFunction(),
                                           base::StringPrintf(
       "[{\"url\": \"%s\","
       "  \"filename\": \"../../../../../etc/passwd\"}]",
       download_url.c_str())).c_str());
 }
 
+// flaky on mac: crbug.com/392288
+#if defined(OS_MACOSX)
+#define MAYBE_DownloadExtensionTest_Download_InvalidURLs \
+        DISABLED_DownloadExtensionTest_Download_InvalidURLs
+#else
+#define MAYBE_DownloadExtensionTest_Download_InvalidURLs \
+        DownloadExtensionTest_Download_InvalidURLs
+#endif
+
 // Test that downloading invalid URLs immediately returns kInvalidURLError.
 IN_PROC_BROWSER_TEST_F(DownloadExtensionTest,
-                       DownloadExtensionTest_Download_InvalidURLs) {
+                       MAYBE_DownloadExtensionTest_Download_InvalidURLs) {
   LoadExtension("downloads_split");
   GoOnTheRecord();
 
   static const char* kInvalidURLs[] = {
     "foo bar",
     "../hello",
     "/hello",
     "http://",
     "#frag",
     "foo/bar.html#frag",
@@ skipping 2397 matching lines @@
   EXPECT_EQ(downloads::FILENAME_CONFLICT_ACTION_PROMPT, conflict_action);
   EXPECT_FALSE(warnings.empty());
   EXPECT_EQ(ExtensionWarning::kDownloadFilenameConflict,
             warnings.begin()->warning_type());
   EXPECT_EQ("incumbent", warnings.begin()->extension_id());
 }
 
 }  // namespace extensions
 
 #endif  // http://crbug.com/3061144