Disable all the browser_tests that are flaking more than 5% of the time on trybots.

chrome/browser/ui/webui/print_preview/print_preview_ui_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 "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/task_manager/task_manager_browsertest_util.h"
@@ skipping 84 matching lines @@
   // Create the print preview dialog.
   Print();
 
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAboutBlankTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyPrint()));
   ASSERT_NO_FATAL_FAILURE(
       WaitForTaskManagerRows(1, MatchPrint(url::kAboutBlankURL)));
 }
 
-// Disable the test for mac as it started being flaky, see http://crbug/367665.
-#if defined(OS_MACOSX) && !defined(OS_IOS)
-#define MAYBE_TaskManagerExistingPrintPreview DISABLED_TaskManagerExistingPrintPreview
-#else
-#define MAYBE_TaskManagerExistingPrintPreview TaskManagerExistingPrintPreview
-#endif
+// http://crbug/367665.
 IN_PROC_BROWSER_TEST_F(PrintPreviewTest,
-                       MAYBE_TaskManagerExistingPrintPreview) {
+                       DISABLED_TaskManagerExistingPrintPreview) {
   // Create the print preview dialog.
   Print();
 
   chrome::ShowTaskManager(browser());  // Show task manager AFTER print dialog.
 
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAboutBlankTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyPrint()));
   ASSERT_NO_FATAL_FAILURE(
       WaitForTaskManagerRows(1, MatchPrint(url::kAboutBlankURL)));
@@ skipping 53 matching lines @@
 
   ASSERT_EQ(result, SIMPLEREGION);
   bool rects_equal =
       region_before.left == region_after.left &&
       region_before.top == region_after.top &&
       region_before.right == region_after.right &&
       region_before.bottom == region_after.bottom;
   ASSERT_FALSE(rects_equal);
 }
 
-IN_PROC_BROWSER_TEST_F(PrintPreviewTest, NoCrashOnCloseWithOtherTabs) {
+// http://crbug.com/396360
+IN_PROC_BROWSER_TEST_F(PrintPreviewTest, DISABLED_NoCrashOnCloseWithOtherTabs) {
   // Now print preview.
   Print();
 
   ui_test_utils::NavigateToURLWithDisposition(
       browser(), GURL("about:blank"), NEW_FOREGROUND_TAB,
       ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);
 
   browser()->tab_strip_model()->ActivateTabAt(0, true);
 
   // Navigate main tab to hide print preview.
   ui_test_utils::NavigateToURL(browser(), GURL("about:blank"));
 
   browser()->tab_strip_model()->ActivateTabAt(1, true);
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace