[ios] Cleanup SessionServiceIOS implementation.

ios/chrome/browser/sessions/session_service_ios_unittest.mm

 // Copyright 2012 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.
 
 #import <Foundation/Foundation.h>
 
 #include <memory>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #include "ios/chrome/browser/chrome_paths.h"
-#import "ios/chrome/browser/sessions/session_service.h"
+#import "ios/chrome/browser/sessions/session_service_ios.h"
 #import "ios/chrome/browser/sessions/session_window_ios.h"
 #include "ios/web/public/navigation_item.h"
 #import "ios/web/public/navigation_manager.h"
 #include "ios/web/public/test/test_web_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ skipping 29 matching lines @@
     EXPECT_TRUE(success);
     if (!success) {
       return nil;
     }
 
     plist_path = plist_path.AppendASCII("sessions");
     plist_path = plist_path.Append(filename);
     EXPECT_TRUE(base::PathExists(plist_path));
 
     NSString* path = base::SysUTF8ToNSString(plist_path.value());
-    return [service loadWindowFromPath:path
-                       forBrowserState:chrome_browser_state_.get()];
+    return [service loadWindowFromPath:path];
   }
 
   ios::ChromeBrowserState* chrome_browser_state() {
     return chrome_browser_state_.get();
   }
 
   NSString* directory_name() { return directory_name_; }
 
  private:
   base::ScopedTempDir test_dir_;
@@ skipping 75 matching lines @@
 
 // TODO(crbug.com/661633): remove this once M68 has shipped (i.e. once more
 // than a year has passed since the introduction of the compatibility code).
 TEST_F(SessionServiceTest, LoadM58Session) {
   SessionWindowIOS* session_window =
       LoadSessionFromTestDataFile(FILE_PATH_LITERAL("session_m58.plist"));
   EXPECT_TRUE(session_window != nil);
 }
 
 }  // anonymous namespace