Disable flaky DownloadTest.FeedbackServiceKeepDownload

chrome/browser/download/download_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.
 
 #include "chrome/browser/download/download_browsertest.h"
 
 #include <stdint.h>
 #include <sstream>
 #include <utility>
 
@@ skipping 3419 matching lines @@
       *(downloads[0])));
 
   // Begin feedback and check that the file is "stolen".
   download_protection_service->feedback_service()->BeginFeedbackForDownload(
       downloads[0], DownloadCommands::DISCARD);
   std::vector<DownloadItem*> updated_downloads;
   GetDownloads(browser(), &updated_downloads);
   ASSERT_TRUE(updated_downloads.empty());
 }
 
-IN_PROC_BROWSER_TEST_F(DownloadTest, FeedbackServiceKeepDownload) {
+// Test is flaky Linux. crbug.com/705224
+#if defined(OS_LINUX)
+#define MAYBE_FeedbackServiceKeepDownload DISABLED_FeedbackServiceKeepDownload
+#else
+#define MAYBE_FeedbackServiceKeepDownload FeedbackServiceKeepDownload
+#endif
+IN_PROC_BROWSER_TEST_F(DownloadTest, MAYBE_FeedbackServiceKeepDownload) {
   PrefService* prefs = browser()->profile()->GetPrefs();
   prefs->SetBoolean(prefs::kSafeBrowsingEnabled, true);
   safe_browsing::SetExtendedReportingPref(prefs, true);
 
   // Make a dangerous file.
   GURL download_url(net::URLRequestMockHTTPJob::GetMockUrl(
       "downloads/dangerous/dangerous.swf"));
   std::unique_ptr<content::DownloadTestObserverInterrupted>
       interruption_observer(new content::DownloadTestObserverInterrupted(
           DownloadManagerForBrowser(browser()), 1,
@@ skipping 347 matching lines @@
           browser(), 1,
           content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_DENY));
   ui_test_utils::NavigateToURL(browser(), extension_url);
 
   observer->WaitForFinished();
 
   // Download shelf should close.
   EXPECT_FALSE(browser()->window()->IsDownloadShelfVisible());
 }
 #endif  // defined(OS_CHROMEOS)