Disable all the tests that are flaking more than 5% on Linux builders.

chrome/browser/component_updater/test/component_updater_service_unittest.cc

 // Copyright 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 <vector>
 
 #include "chrome/browser/component_updater/test/component_updater_service_unittest.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
@@ skipping 441 matching lines @@
 
   component_updater()->Stop();
 }
 
 // Test that a update check due to an on demand call can cause installs.
 // Here is the timeline:
 //  - First loop: we return a reply that indicates no update, so
 //    nothing happens.
 //  - We make an on demand call.
 //  - This triggers a second loop, which has a reply that triggers an install.
-TEST_F(ComponentUpdaterTest, OnDemandUpdate) {
+#if defined(OS_LINUX)
+// http://crbug.com/396488
+#define MAYBE_OnDemandUpdate DISABLED_OnDemandUpdate
+#else
+#define MAYBE_OnDemandUpdate OnDemandUpdate
+#endif
+TEST_F(ComponentUpdaterTest, MAYBE_OnDemandUpdate) {
   MockServiceObserver observer;
   {
     InSequence seq;
     EXPECT_CALL(observer,
                 OnEvent(ServiceObserver::COMPONENT_UPDATER_STARTED, ""))
         .Times(1);
     EXPECT_CALL(observer,
                 OnEvent(ServiceObserver::COMPONENT_NOT_UPDATED,
                         "abagagagagagagagagagagagagagagag"))
         .Times(1);
@@ skipping 1017 matching lines @@
   component_updater()->RemoveObserver(&observer2);
 
   test_configurator()->SetLoopCount(1);
   component_updater()->Start();
   RunThreads();
 
   component_updater()->Stop();
 }
 
 }  // namespace component_updater