chromeos: Fix UpdateScreenTest and NetworkScreenTest for Debug build.

chrome/browser/chromeos/dbus/dbus_thread_manager.h

Index: chrome/browser/chromeos/dbus/dbus_thread_manager.h
diff --git a/chrome/browser/chromeos/dbus/dbus_thread_manager.h b/chrome/browser/chromeos/dbus/dbus_thread_manager.h
index d3aae9b9879dff5e56106b7fd116d3522994e6d2..fdac52932d562c0effff9d2635c4254acca547c3 100644
--- a/chrome/browser/chromeos/dbus/dbus_thread_manager.h
+++ b/chrome/browser/chromeos/dbus/dbus_thread_manager.h
@@ -91,14 +91,6 @@ class DBusThreadManager {
   // down.
   virtual SessionManagerClient* session_manager_client() = 0;
 
-  // Sets the session manager client. Takes the ownership.
-  // The function is exported for testing.
-  //
-  // TODO(satorux): Remove this once we convert tests to use
-  // MockDBusThreadManager.
-  virtual void set_session_manager_client_for_testing(
-      SessionManagerClient* session_manager_client) = 0;
-
   // Returns the speech synthesizer client, owned by DBusThreadManager.
   // Do not cache this pointer and use it after DBusThreadManager is shut
   // down.