Remove LocalFrameLifecycleObserver::willDetachFrameHost()

third_party/WebKit/Source/modules/screen_orientation/ScreenOrientationController.cpp

 // Copyright 2014 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.
 
 #include "modules/screen_orientation/ScreenOrientationController.h"
 
 #include "core/events/Event.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 179 matching lines @@
 void ScreenOrientationController::unregisterWithDispatcher()
 {
     ScreenOrientationDispatcher::instance().removeController(this);
 }
 
 bool ScreenOrientationController::hasLastData()
 {
     return true;
 }
 
-void ScreenOrientationController::willDetachFrameHost()
+void ScreenOrientationController::contextDestroyed()
 {
     m_client = nullptr;
 }
 
 void ScreenOrientationController::notifyDispatcher()
 {
     if (m_orientation && page()->isPageVisible())
         startUpdating();
     else
         stopUpdating();
 }
 
 DEFINE_TRACE(ScreenOrientationController)
 {
     visitor->trace(m_orientation);
     LocalFrameLifecycleObserver::trace(visitor);
     Supplement<LocalFrame>::trace(visitor);
     PlatformEventController::trace(visitor);
 }
 
 } // namespace blink