Enable captive portal detection by default.

chrome/browser/captive_portal/captive_portal_service_unittest.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/captive_portal/captive_portal_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/test/test_timeouts.h"
@@ skipping 120 matching lines @@
 }  // namespace
 
 class CaptivePortalServiceTest : public testing::Test {
  public:
   CaptivePortalServiceTest() {}
 
   virtual ~CaptivePortalServiceTest() {}
 
   void Initialize(bool enable_on_command_line) {
     if (enable_on_command_line) {
-      CommandLine::ForCurrentProcess()->AppendSwitch(
-          switches::kCaptivePortalDetection);
+      CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+          switches::kCaptivePortalDetection,
+          switches::kCaptivePortalDetectionEnabled);
+    } else {
+      CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+          switches::kCaptivePortalDetection,
+          switches::kCaptivePortalDetectionDisabled);
     }
 
     profile_.reset(new TestingProfile());
     service_.reset(new TestCaptivePortalService(profile_.get()));
     scoped_ptr<TestCaptivePortalService> service_;
 
     // Use no delays for most tests.
     set_initial_backoff_no_portal(base::TimeDelta());
     set_initial_backoff_portal(base::TimeDelta());
 
@@ skipping 461 matching lines @@
 
   RunTest(RESULT_NO_RESPONSE,
           net::OK,
           503,
           0,
           "HTTP/1.1 503 OK\nRetry-After: Christmas\n\n");
   EXPECT_EQ(base::TimeDelta::FromSeconds(100), GetTimeUntilNextRequest());
 }
 
 }  // namespace captive_portal