Smart Lock: Remove unused service observer methods.

R=hansberry@chromium.org

Bug: 899324
Test: none
Change-Id: Ic0e717072a242ab397aad86a5ce651d4ea7de970
Reviewed-on: https://chromium-review.googlesource.com/c/1315488Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605018}

chrome/browser/chromeos/login/easy_unlock/easy_unlock_service.cc

@@ -483,14 +483,6 @@ void EasyUnlockService::CheckCryptohomeKeysAndMaybeHardlock() {
                  weak_ptr_factory_.GetWeakPtr(), account_id, paired_devices));
 }
 
-void EasyUnlockService::AddObserver(EasyUnlockServiceObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void EasyUnlockService::RemoveObserver(EasyUnlockServiceObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
 void EasyUnlockService::Shutdown() {
   if (shut_down_)
     return;

chrome/browser/chromeos/login/easy_unlock/easy_unlock_service.h

@@ -12,7 +12,6 @@
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/observer_list.h"
 #include "build/build_config.h"
 #include "chrome/browser/chromeos/login/easy_unlock/chrome_proximity_auth_client.h"
 #include "chrome/browser/chromeos/login/easy_unlock/easy_unlock_auth_attempt.h"
@@ -51,8 +50,6 @@ namespace secure_channel {
 class SecureChannelClient;
 }  // namespace secure_channel
 
-class EasyUnlockServiceObserver;
-
 class EasyUnlockService : public KeyedService {
  public:
   enum Type { TYPE_REGULAR, TYPE_SIGNIN };
@@ -163,9 +160,6 @@ class EasyUnlockService : public KeyedService {
   // hardlock state if the two do not match.
   void CheckCryptohomeKeysAndMaybeHardlock();
 
-  void AddObserver(EasyUnlockServiceObserver* observer);
-  void RemoveObserver(EasyUnlockServiceObserver* observer);
-
   ChromeProximityAuthClient* proximity_auth_client() {
     return &proximity_auth_client_;
   }
@@ -287,8 +281,6 @@ class EasyUnlockService : public KeyedService {
 
   bool tpm_key_checked_;
 
-  base::ObserverList<EasyUnlockServiceObserver>::Unchecked observers_;
-
   base::WeakPtrFactory<EasyUnlockService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockService);