user_manager: Remove deps on session_manager

chrome/browser/chromeos/login/session/user_session_manager.cc

Index: chrome/browser/chromeos/login/session/user_session_manager.cc
diff --git a/chrome/browser/chromeos/login/session/user_session_manager.cc b/chrome/browser/chromeos/login/session/user_session_manager.cc
index 5c8a14dfc6e26c2a2ce8b1321cc5f860ef1f131b..06c04ab4854d3b83fb7addfe9d9d1ee1b9c089bc 100644
--- a/chrome/browser/chromeos/login/session/user_session_manager.cc
+++ b/chrome/browser/chromeos/login/session/user_session_manager.cc
@@ -1745,7 +1745,7 @@ void UserSessionManager::DoBrowserLaunchInternal(Profile* profile,
   // browser before it is dereferenced by the login host.
   if (login_host)
     login_host->Finalize();
-  user_manager::UserManager::Get()->SessionStarted();
+  g_browser_process->platform_part()->SessionManager()->SessionStarted();

[achuithb, 2016/10/20 17:22:31]

What's the difference between this and
session_manager::SessionManager::Get()->SessionStarted();

[xiyuan, 2016/10/20 17:26:50]

They are the same. Line 1138 uses platform_part()->SessionManager() way so I was
trying to be consistent here.

I could change Line 1138 to use session_manager::SessionManager::Get() too.

Let me know which way you prefer.

[achuithb, 2016/10/20 17:39:44]

Sure, if the current way is more consistent with the usage in the file, let's
leave it that way.

   chromeos::BootTimesRecorder::Get()->LoginDone(
       user_manager::UserManager::Get()->IsCurrentUserNew());