redesign and reimplement proxy config service and tracker, revise proxy ui on cros

chrome/browser/extensions/extension_proxy_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/prefs/proxy_config_dictionary.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 237 matching lines @@
 
   // Now check the incognito preferences.
   pref_service = browser()->profile()->GetOffTheRecordProfile()->GetPrefs();
   ValidateSettings(ProxyPrefs::MODE_FIXED_SERVERS,
                    "http=1.1.1.1:80",
                    "localhost,::1,foo.bar,<local>",
                    kNoPac,
                    pref_service);
 }
 
+// This test sets proxy to an inavalid host "does.not.exist" and then fetches
+// a page from localhost, expecting an error since host is invalid.
+// On ChromeOS, localhost is by default bypassed, so the page from localhost
+// will be fetched successfully, resulting in no error.  Hence this test
+// shouldn't run on ChromeOS.
+#if defined(OS_CHROMEOS)
+#define MAYBE_ProxyEventsInvalidProxy DISABLED_ProxyEventsInvalidProxy
+#else
+#define MAYBE_ProxyEventsInvalidProxy ProxyEventsInvalidProxy
+#endif  // defined(OS_CHROMEOS)
+
 // Tests error events: invalid proxy
-IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest, ProxyEventsInvalidProxy) {
+IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest, MAYBE_ProxyEventsInvalidProxy) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(
       RunExtensionSubtest("proxy/events", "invalid_proxy.html")) << message_;
 }
 
 // Tests error events: PAC script parse error.
 IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest, ProxyEventsParseError) {
   ASSERT_TRUE(
       RunExtensionSubtest("proxy/events", "parse_error.html")) << message_;
 }