[s13n] Remove merge_session_observer_bridge.mm/h

This CL removes dead files, merge_session_observer_bridge.mm/h.

Bug: 926889
Change-Id: Ib66ed739e254bdac1be7b3019b270999c0e77fc4
Reviewed-on: https://chromium-review.googlesource.com/c/1447403Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Reviewed-by: Lowell Manners <lowell@chromium.org>
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#628160}

components/signin/ios/browser/BUILD.gn

@@ -8,8 +8,6 @@ source_set("browser") {
     "account_consistency_service.h",
     "account_consistency_service.mm",
     "manage_accounts_delegate.h",
-    "merge_session_observer_bridge.h",
-    "merge_session_observer_bridge.mm",
     "profile_oauth2_token_service_ios_delegate.h",
     "profile_oauth2_token_service_ios_delegate.mm",
     "profile_oauth2_token_service_ios_provider.h",

components/signin/ios/browser/merge_session_observer_bridge.h

-// Copyright 2014 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.
-
-#ifndef COMPONENTS_SIGNIN_IOS_BROWSER_MERGE_SESSION_OBSERVER_BRIDGE_H_
-#define COMPONENTS_SIGNIN_IOS_BROWSER_MERGE_SESSION_OBSERVER_BRIDGE_H_
-
-#import <Foundation/Foundation.h>
-
-#include <string>
-
-#include "base/macros.h"
-#include "components/signin/core/browser/gaia_cookie_manager_service.h"
-
-class GoogleServiceAuthError;
-
-@protocol MergeSessionObserverBridgeDelegate
-
-// Informs the delegate that the merge session operation for |account_id| has
-// finished. If there was an error, it will be described in |error|.
-- (void)onMergeSessionCompleted:(const std::string&)account_id
-                          error:(const GoogleServiceAuthError&)error;
-
-@end
-
-// C++ class to monitor merge session status in Objective C type.
-class MergeSessionObserverBridge : public GaiaCookieManagerService::Observer {
- public:
-  MergeSessionObserverBridge(id<MergeSessionObserverBridgeDelegate> delegate,
-                             GaiaCookieManagerService* cookie_manager_service);
-  ~MergeSessionObserverBridge() override;
-
-  void OnAddAccountToCookieCompleted(
-      const std::string& account_id,
-      const GoogleServiceAuthError& error) override;
-
- private:
-  __weak id<MergeSessionObserverBridgeDelegate> delegate_;
-  GaiaCookieManagerService* cookie_manager_service_;
-
-  DISALLOW_COPY_AND_ASSIGN(MergeSessionObserverBridge);
-};
-
-#endif  // COMPONENTS_SIGNIN_IOS_BROWSER_MERGE_SESSION_OBSERVER_BRIDGE_H_

components/signin/ios/browser/merge_session_observer_bridge.mm

-// Copyright 2014 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 "components/signin/ios/browser/merge_session_observer_bridge.h"
-
-#include "base/logging.h"
-#include "google_apis/gaia/google_service_auth_error.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-MergeSessionObserverBridge::MergeSessionObserverBridge(
-    id<MergeSessionObserverBridgeDelegate> delegate,
-    GaiaCookieManagerService* cookie_manager_service)
-    : delegate_(delegate), cookie_manager_service_(cookie_manager_service) {
-  DCHECK(delegate);
-  DCHECK(cookie_manager_service);
-  cookie_manager_service_->AddObserver(this);
-}
-
-MergeSessionObserverBridge::~MergeSessionObserverBridge() {
-  cookie_manager_service_->RemoveObserver(this);
-}
-
-void MergeSessionObserverBridge::OnAddAccountToCookieCompleted(
-    const std::string& account_id,
-    const GoogleServiceAuthError& error) {
-  [delegate_ onMergeSessionCompleted:account_id error:error];
-}