--- a/third_party/blink/public/common/widget/device_emulation_params.h
+++ b/third_party/blink/public/common/widget/device_emulation_params.h
@@ -21,6 +21,9 @@ namespace blink {
 struct DeviceEmulationParams {
   mojom::EmulatedScreenType screen_type = mojom::EmulatedScreenType::kDesktop;
 
+  // Forces screen recalculation the same way as mobile
+  bool force_mobile_calc = false;
+
   // Emulated screen size. Typically full / physical size of the device screen
   // in DIP. Empty size means using default value: original one for kDesktop
   // screen position, equal to |view_size| for kMobile.
@@ -87,7 +87,8 @@
          a.device_posture == b.device_posture &&
          a.force_android_overlay_scrollbar ==
              b.force_android_overlay_scrollbar &&
-         a.force_viewport_meta == b.force_viewport_meta;
+         a.force_viewport_meta == b.force_viewport_meta &&
+         a.force_mobile_calc == b.force_mobile_calc;
 }
 
 }  // namespace blink