OS_CHROMEOS isn't defined on the Linux views bot.

chrome/browser/extensions/extension_tabs_apitest.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/extensions/extension_apitest.h"
 
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 95 matching lines @@
 #endif
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_CaptureVisibleTabJpeg) {
   host_resolver()->AddRule("a.com", "127.0.0.1");
   host_resolver()->AddRule("b.com", "127.0.0.1");
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/capture_visible_tab",
                                   "test_jpeg.html")) << message_;
 }
 
 // Test is timing out on cros and flaky on others. See http://crbug.com/83876
-#if defined(OS_CHROMEOS)
+#if defined(OS_LINUX) && defined(TOOLKIT_VIEWS)
 #define MAYBE_CaptureVisibleTabPng DISABLED_CaptureVisibleTabPng
 #else
 #define MAYBE_CaptureVisibleTabPng FLAKY_CaptureVisibleTabPng
 #endif
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_CaptureVisibleTabPng) {
   host_resolver()->AddRule("a.com", "127.0.0.1");
   host_resolver()->AddRule("b.com", "127.0.0.1");
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/capture_visible_tab",
                                   "test_png.html")) << message_;
@@ skipping 48 matching lines @@
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, GetViewsOfCreatedPopup) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "get_views_popup.html"))
       << message_;
 }
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, GetViewsOfCreatedWindow) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "get_views_window.html"))
       << message_;
 }