Disable flaky tests on Linux and ChromeOS.

chrome/browser/push_messaging/push_messaging_browsertest.cc

 // Copyright 2014 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 <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <string>
 
@@ skipping 493 matching lines @@
   ASSERT_TRUE(RunScript("registerServiceWorker()", &script_result));
   ASSERT_EQ("ok - service worker registered", script_result);
 
   ASSERT_NO_FATAL_FAILURE(RequestAndAcceptPermission());
 
   ASSERT_TRUE(RunScript("documentSubscribePush()", &script_result));
   EXPECT_EQ("NotAllowedError - Registration failed - permission denied",
             script_result);
 }
 
-IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, SubscribeWorker) {
+// Flaky on ChromeOS and Linux. See http://crbug.com/657202.
+#if defined(OS_CHROMEOS) || defined(OS_LINUX)
+#define MAYBE_SubscribeWorker DISABLED_SubscribeWorker
+#else
+#define MAYBE_SubscribeWorker SubscribeWorker
+#endif
+IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, MAYBE_SubscribeWorker) {
   std::string script_result;
 
   ASSERT_TRUE(RunScript("registerServiceWorker()", &script_result));
   ASSERT_EQ("ok - service worker registered", script_result);
 
   ASSERT_NO_FATAL_FAILURE(RequestAndAcceptPermission());
 
   LoadTestPage();  // Reload to become controlled.
 
   ASSERT_TRUE(RunScript("isControlled()", &script_result));
@@ skipping 22 matching lines @@
   std::string token2;
   ASSERT_NO_FATAL_FAILURE(
       EndpointToToken(script_result, true /* standard_protocol */, &token2));
   EXPECT_NE(token1, token2);
 
   ASSERT_TRUE(RunScript("unsubscribePush()", &script_result));
   EXPECT_EQ("unsubscribe result: true", script_result);
   EXPECT_NE(push_service(), GetAppHandler());
 }
 
-IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest, SubscribeWorkerUsingManifest) {
+// Flaky on ChromeOS and Linux. See http://crbug.com/657202.
+#if defined(OS_CHROMEOS) || defined(OS_LINUX)
+#define MAYBE_SubscribeWorkerUsingManifest DISABLED_SubscribeWorkerUsingManifest
+#else
+#define MAYBE_SubscribeWorkerUsingManifest SubscribeWorkerUsingManifest
+#endif
+IN_PROC_BROWSER_TEST_F(PushMessagingBrowserTest,
+                       MAYBE_SubscribeWorkerUsingManifest) {
   std::string script_result;
 
   ASSERT_TRUE(RunScript("registerServiceWorker()", &script_result));
   ASSERT_EQ("ok - service worker registered", script_result);
 
   ASSERT_NO_FATAL_FAILURE(RequestAndAcceptPermission());
 
   LoadTestPage();  // Reload to become controlled.
 
   ASSERT_TRUE(RunScript("isControlled()", &script_result));
@@ skipping 1301 matching lines @@
   ASSERT_NO_FATAL_FAILURE(SubscribeSuccessfully());
   ASSERT_FALSE(background_mode_manager->IsBackgroundModeActive());
 
   // After dropping the last subscription background mode is still inactive.
   std::string script_result;
   ASSERT_TRUE(RunScript("unsubscribePush()", &script_result));
   EXPECT_EQ("unsubscribe result: true", script_result);
   ASSERT_FALSE(background_mode_manager->IsBackgroundModeActive());
 }
 #endif  // BUILDFLAG(ENABLE_BACKGROUND) && !defined(OS_CHROMEOS)