signin: pull basic SigninManager functionality into new SigninManagerBase class.

chrome/browser/policy/url_blacklist_manager_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/policy/url_blacklist_manager.h"
 
 #include <ostream>
 
 #include "base/basictypes.h"
 #include "base/message_loop.h"
@@ skipping 497 matching lines @@
   net::TestURLRequestContext context;
   net::URLRequest request(GURL("http://google.com"), NULL, &context);
 
   // Background requests aren't filtered.
   EXPECT_FALSE(blacklist_manager_->IsRequestBlocked(request));
 
   // Main frames are filtered.
   request.set_load_flags(net::LOAD_MAIN_FRAME);
   EXPECT_TRUE(blacklist_manager_->IsRequestBlocked(request));
 
-  // Sync gets a free pass.
+  // On most platforms, sync gets a free pass due to signin flows.
+  bool block_signin_urls = false;
+#if defined(OS_CHROMEOS)
+  // There are no sync specific signin flows on Chrome OS, so no special
+  // treatment.
+  block_signin_urls = true;
+#endif
+
   GURL sync_url(
       GaiaUrls::GetInstance()->service_login_url() + "?service=chromiumsync");
   net::URLRequest sync_request(sync_url, NULL, &context);
   sync_request.set_load_flags(net::LOAD_MAIN_FRAME);
-  EXPECT_FALSE(blacklist_manager_->IsRequestBlocked(sync_request));
+  EXPECT_EQ(block_signin_urls,
+            blacklist_manager_->IsRequestBlocked(sync_request));
 }
 
 }  // namespace policy