[ios] Cleanup SessionServiceIOS implementation.

ios/chrome/browser/sessions/session_service_ios_unittest.mm

Index: ios/chrome/browser/sessions/session_service_ios_unittest.mm
diff --git a/ios/chrome/browser/sessions/session_service_unittest.mm b/ios/chrome/browser/sessions/session_service_ios_unittest.mm
similarity index 97%
rename from ios/chrome/browser/sessions/session_service_unittest.mm
rename to ios/chrome/browser/sessions/session_service_ios_unittest.mm
index f6cbfcf5008031abd3d71c9b4567bc75a4b4f868..41ec9cda9176d6563cc51a01e773ef65c688aa60 100644
--- a/ios/chrome/browser/sessions/session_service_unittest.mm
+++ b/ios/chrome/browser/sessions/session_service_ios_unittest.mm
@@ -13,7 +13,7 @@
 #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"
@@ -63,8 +63,7 @@ class SessionServiceTest : public PlatformTest {
     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() {