Mark TaskManagerBrowserTest.ShutdownWhileOpen flaky on ChromeOS.

chrome/browser/task_manager/task_manager_browsertest.cc

 // Copyright (c) 2011 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/task_manager/task_manager.h"
 
 #include "base/file_path.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/background/background_contents_service.h"
 #include "chrome/browser/background/background_contents_service_factory.h"
@@ skipping 38 matching lines @@
 
 }  // namespace
 
 class TaskManagerBrowserTest : public ExtensionBrowserTest {
  public:
   TaskManagerModel* model() const {
     return TaskManager::GetInstance()->model();
   }
 };
 
+// Flaky on ChromeOS (triggers pure virtual function call), see
+// http://crbug.com/92297 for details
+#if defined(OS_CHROMEOS)
+#define MAYBE_ShutdownWhileOpen FLAKY_ShutdownWhileOpen
+#else
+#define MAYBE_ShutdownWhileOpen ShutdownWhileOpen
+#endif
+
 // Regression test for http://crbug.com/13361
-IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, ShutdownWhileOpen) {
+IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, MAYBE_ShutdownWhileOpen) {
   browser()->window()->ShowTaskManager();
 }
 
 IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, NoticeTabContentsChanges) {
   EXPECT_EQ(0, model()->ResourceCount());
 
   // Show the task manager. This populates the model, and helps with debugging
   // (you see the task manager).
   browser()->window()->ShowTaskManager();
 
@@ skipping 363 matching lines @@
   TaskManagerBrowserTestUtil::WaitForResourceChange(3);
 
   // Check that we get some value for the cache columns.
   DCHECK_NE(model()->GetResourceWebCoreImageCacheSize(2),
             l10n_util::GetStringUTF16(IDS_TASK_MANAGER_NA_CELL_TEXT));
   DCHECK_NE(model()->GetResourceWebCoreScriptsCacheSize(2),
             l10n_util::GetStringUTF16(IDS_TASK_MANAGER_NA_CELL_TEXT));
   DCHECK_NE(model()->GetResourceWebCoreCSSCacheSize(2),
             l10n_util::GetStringUTF16(IDS_TASK_MANAGER_NA_CELL_TEXT));
 }