Remove LocalFrameLifecycleObserver::willDetachFrameHost()

third_party/WebKit/Source/modules/vr/VRController.h

Index: third_party/WebKit/Source/modules/vr/VRController.h
diff --git a/third_party/WebKit/Source/modules/vr/VRController.h b/third_party/WebKit/Source/modules/vr/VRController.h
index 32c984cd77937391708ab07aec2322d5969abf4b..3e01a2fc715e5f48db600b1766a1c9725eb23e24 100644
--- a/third_party/WebKit/Source/modules/vr/VRController.h
+++ b/third_party/WebKit/Source/modules/vr/VRController.h
@@ -5,7 +5,7 @@
 #ifndef VRController_h
 #define VRController_h
 
-#include "core/frame/LocalFrameLifecycleObserver.h"
+#include "core/frame/LocalFrame.h"
 #include "device/vr/vr_service.mojom-blink.h"
 #include "modules/ModulesExport.h"
 #include "platform/Supplementable.h"
@@ -20,8 +20,7 @@ class VRGetDevicesCallback;
 
 class MODULES_EXPORT VRController final
     : public GarbageCollectedFinalized<VRController>
-    , public Supplement<LocalFrame>
-    , public LocalFrameLifecycleObserver {
+    , public Supplement<LocalFrame> {
     USING_GARBAGE_COLLECTED_MIXIN(VRController);
     WTF_MAKE_NONCOPYABLE(VRController);
 public:
@@ -42,9 +41,6 @@ public:
 private:
     VRController(LocalFrame&, ServiceRegistry*);
 
-    // Inherited from LocalFrameLifecycleObserver.
-    void willDetachFrameHost() override;
-
     // Binding callbacks.
     void onGetDisplays(mojo::WTFArray<device::blink::VRDisplayPtr>);