signin: pull basic SigninManager functionality into new SigninManagerBase class.

chrome/browser/policy/url_blacklist_manager_unittest.cc

Index: chrome/browser/policy/url_blacklist_manager_unittest.cc
diff --git a/chrome/browser/policy/url_blacklist_manager_unittest.cc b/chrome/browser/policy/url_blacklist_manager_unittest.cc
index 3e5ac0f52614212f9d8edb9ad1f5d267681f0a7d..1c928233609a2c786af4bc8ed76fd0e8f2805909 100644
--- a/chrome/browser/policy/url_blacklist_manager_unittest.cc
+++ b/chrome/browser/policy/url_blacklist_manager_unittest.cc
@@ -463,12 +463,20 @@ TEST_F(URLBlacklistManagerTest, DontBlockResources) {
   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