SameSite: Implement 'Strict'/'Lax' attribute parsing.

net/url_request/url_request_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 <utility>
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 2646 matching lines @@
 
   TestNetworkDelegate network_delegate;
   network_delegate.set_experimental_cookie_features_enabled(true);
   default_context_.set_network_delegate(&network_delegate);
 
   // Set up a 'SameSite' cookie (on '127.0.0.1', as that's where
   // LocalHttpTestServer points).
   {
     TestDelegate d;
     scoped_ptr<URLRequest> req(default_context_.CreateRequest(
-        test_server.GetURL("/set-cookie?SameSiteCookieToSet=1;SameSite"),
+        test_server.GetURL("/set-cookie?SameSiteCookieToSet=1;SameSite=Strict"),
         DEFAULT_PRIORITY, &d));
     req->Start();
     base::RunLoop().Run();
     EXPECT_EQ(0, network_delegate.blocked_get_cookies_count());
     EXPECT_EQ(0, network_delegate.blocked_set_cookie_count());
     EXPECT_EQ(1, network_delegate.set_cookie_count());
   }
 
   // Verify that the cookie is sent for same-site requests.
   {
@@ skipping 7337 matching lines @@
   AddTestInterceptor()->set_main_intercept_job(std::move(job));
 
   req->Start();
   req->Cancel();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(URLRequestStatus::CANCELED, req->status().status());
   EXPECT_EQ(0, d.received_redirect_count());
 }
 
 }  // namespace net