Moved |openedByDOM| to WebState's CreateParams and public interface.

ios/chrome/browser/sessions/DEPS

Index: ios/chrome/browser/sessions/DEPS
diff --git a/ios/chrome/browser/sessions/DEPS b/ios/chrome/browser/sessions/DEPS
index 37eafb3d375269e53aef8f9b3ffd15575ac825f3..13ab38aa2ebf01c318d537b182d7f40c9dbee2b7 100644
--- a/ios/chrome/browser/sessions/DEPS
+++ b/ios/chrome/browser/sessions/DEPS
@@ -4,18 +4,6 @@ specific_include_rules = {
     "+ios/web/navigation/crw_session_certificate_policy_manager.h",
   ],
 
-  # TODO(crbug.com/620045): Remove these exceptions.
-  "^session_window\.h$": [
-    "+ios/web/web_state/web_state_impl.h",
-  ],
-  "^session_window\.mm$": [
-    "+ios/web/navigation/crw_session_controller.h",
-    "+ios/web/web_state/web_state_impl.h",
-  ],
-  "^session_window_unittest\.mm$": [
-    "+ios/web/navigation/crw_session_controller.h",
-  ],
-
   # TODO(crbug.com/620083): Remove this exception.
   "^tab_restore_service_delegate_impl_ios\.mm$": [
     "+ios/web/navigation/navigation_manager_impl.h",