Revert of Hook up ProximityAuthSystem in EasyUnlockService.

components/proximity_auth/screenlock_bridge.cc

Index: components/proximity_auth/screenlock_bridge.cc
diff --git a/components/proximity_auth/screenlock_bridge.cc b/components/proximity_auth/screenlock_bridge.cc
index c919693262880322d3d54a003f2f1462fa81aadf..029e0b781e734f607f6fce85f2c9bf2338537c84 100644
--- a/components/proximity_auth/screenlock_bridge.cc
+++ b/components/proximity_auth/screenlock_bridge.cc
@@ -4,8 +4,8 @@
 
 #include "components/proximity_auth/screenlock_bridge.h"
 
+#include "base/logging.h"
 #include "base/strings/string16.h"
-#include "components/proximity_auth/logging/logging.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ -131,7 +131,6 @@
   else
     screen_type = lock_handler->GetScreenType();
 
-  focused_user_id_ = std::string();
   lock_handler_ = lock_handler;
   if (lock_handler_)
     FOR_EACH_OBSERVER(Observer, observers_, OnScreenDidLock(screen_type));
@@ -142,13 +141,8 @@
 void ScreenlockBridge::SetFocusedUser(const std::string& user_id) {
   if (user_id == focused_user_id_)
     return;
-  PA_LOG(INFO) << "Focused user changed to " << user_id;
   focused_user_id_ = user_id;
   FOR_EACH_OBSERVER(Observer, observers_, OnFocusedUserChanged(user_id));
-}
-
-std::string ScreenlockBridge::GetFocusedUser() {
-  return focused_user_id_;
 }
 
 bool ScreenlockBridge::IsLocked() const {