Use internal hooks for notifying fullscreen changes to media controls

third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegate.h

 // Copyright 2016 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.
 
 #ifndef MediaControlsOrientationLockDelegate_h
 #define MediaControlsOrientationLockDelegate_h
 
 #include "core/CoreExport.h"
 #include "core/events/EventListener.h"
 #include "public/platform/modules/screen_orientation/WebScreenOrientationLockType.h"
@@ skipping 11 matching lines @@
 // The different states of the class are:
 // - PendingFullscreen: the object is created and is waiting for the associated
 //   <video> to go fullscreen in order to apply an orientation lock;
 // - PendingMetadata: the <video> is fullscreen but the metadata have not been
 //   downloaded yet. It can happen because of network latency or because the
 //   <video> went fullscreen before playback and download started;
 // - MaybeLockedFullscreen: the <video> is fullscreen and a screen orientation
 //   lock was applied.
 //
 // The possible state transitions are:
-// - PendingFullscreen => PendingMetadata: on fullscreenchange event (entering
-//   fullscreen) when metadata are not available;
-// - PendingFullscreen => MaybeLockedFullscreen: on fullscreenchange event
-//   (entering fullscreen) when metadata are available;
+// - PendingFullscreen => PendingMetadata: on entering fullscreen when metadata
+//   are not available;
+// - PendingFullscreen => MaybeLockedFullscreen: on entering fullscreen when
+//   metadata are available;
 // - PendingMetadata => MaybeLockedFullscreen: on loadedmetadata;
-// - PendingMetadata => PendingFullscreen: on fullscreenchange event (leaving
-//   fullscreen);
-// - MaybeLockedFullscreen => PendingFullscreen: on fullscreenchange event
-//   (leaving fullscreen).
+// - PendingMetadata => PendingFullscreen: on exiting fullscreen;
+// - MaybeLockedFullscreen => PendingFullscreen: on exiting fullscreen.
 class CORE_EXPORT MediaControlsOrientationLockDelegate final
     : public EventListener {
  public:
   explicit MediaControlsOrientationLockDelegate(HTMLVideoElement&);
 
-  // Called by MediaControls when the HTMLMediaElement is added to a document
-  // document. All event listeners should be added.
+  // Called by MediaControls when the HTMLMediaElement is added to a document.
+  // All event listeners should be added.
   void attach();
 
   // Called by MediaControls when the HTMLMediaElement is no longer in the
   // document. All event listeners should be removed in order to prepare the
   // object to be garbage collected.
   void detach();
 
+  // Called by MediaControls when the fullscreen element changes.
+  void didEnterFullscreen();
+  void didExitFullscreen();
+
   // EventListener implementation.
   bool operator==(const EventListener&) const override;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   friend class MediaControlsOrientationLockDelegateTest;
 
   enum class State {
     PendingFullscreen,
@@ skipping 28 matching lines @@
   // In other words, whether the orientation was locked.
   bool m_shouldUnlockOrientation = false;
 
   // `m_videoElement` owns MediaControls that owns |this|.
   Member<HTMLVideoElement> m_videoElement;
 };
 
 }  // namespace blink
 
 #endif  // MediaControlsOrientationLockDelegate_h