Disable flaky ExtensionApiTest.TabsNoPermissions on Linux.

chrome/browser/extensions/extension_tabs_apitest.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/extensions/extension_apitest.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 203 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, TabsOnCreated) {
   ASSERT_TRUE(RunExtensionTest("tabs/on_created")) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, TabsOnUpdated) {
   ASSERT_TRUE(RunExtensionTest("tabs/on_updated")) << message_;
 }
 
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, TabsNoPermissions) {
+// Flaky on Linux. http://crbug.com/657376.
+#if defined(OS_LINUX)
+#define MAYBE_TabsNoPermissions DISABLED_TabsNoPermissions
+#else
+#define MAYBE_TabsNoPermissions TabsNoPermissions
+#endif
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_TabsNoPermissions) {
   host_resolver()->AddRule("a.com", "127.0.0.1");
   ASSERT_TRUE(StartEmbeddedTestServer());
   ASSERT_TRUE(RunExtensionTest("tabs/no_permissions")) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, HostPermission) {
   host_resolver()->AddRule("a.com", "127.0.0.1");
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   ASSERT_TRUE(RunExtensionTest("tabs/host_permission")) << message_;
@@ skipping 35 matching lines @@
       << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, OnUpdatedDiscardedState) {
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "discarded.html")) << message_;
 }
 
 // Adding a new test? Awesome. But API tests are the old hotness. The new
 // hotness is extension_function_test_utils. See tabs_test.cc for an example.
 // We are trying to phase out many uses of API tests as they tend to be flaky.