Enable by default threaded compositing on windows and FCM on mac

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 "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 125 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_TabOnRemoved) {
   ASSERT_TRUE(RunExtensionTest("tabs/on_removed")) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_TabReload) {
   ASSERT_TRUE(RunExtensionTest("tabs/reload")) << message_;
 }
 
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, CaptureVisibleTabJpeg) {
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_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_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_CaptureVisibleTabPng) {
   host_resolver()->AddRule("a.com", "127.0.0.1");
   host_resolver()->AddRule("b.com", "127.0.0.1");
@@ skipping 80 matching lines @@
       << message_;
 }
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_GetViewsOfCreatedWindow) {
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "get_views_window.html"))
       << message_;
 }
 
 // Adding a new test? Awesome. But API tests are the old hotness. The
 // new hotness is extension_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.