Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/ui/webui/sync_internals_message_handler_unittest.cc

 // Copyright 2015 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/ui/webui/sync_internals_message_handler.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 94 matching lines @@
   std::unique_ptr<SyncInternalsMessageHandler> handler_;
 
   // Non-owning pointer to the about information the handler uses. This
   // extractor is owned by the handler.
   FakeExtractor* fake_extractor_;
 };
 
 }  // namespace
 
 TEST_F(SyncInternalsMessageHandlerTest, SendAboutInfoWithService) {
-  handler()->OnStateChanged();
+  handler()->OnStateChanged(nullptr);
   EXPECT_EQ(1, fake_extractor()->call_count());
   EXPECT_NE(nullptr, fake_extractor()->last_service());
   EXPECT_NE(nullptr, fake_extractor()->last_signin());
   ValidateAboutInfoCall();
 }
 
 TEST_F(SyncInternalsMessageHandlerTest, SendAboutInfoWithoutService) {
   base::CommandLine::ForCurrentProcess()->AppendSwitch(switches::kDisableSync);
-  handler()->OnStateChanged();
+  handler()->OnStateChanged(nullptr);
   EXPECT_EQ(1, fake_extractor()->call_count());
   EXPECT_EQ(nullptr, fake_extractor()->last_service());
   EXPECT_EQ(nullptr, fake_extractor()->last_signin());
   ValidateAboutInfoCall();
 }