Use internal hooks for notifying fullscreen changes to media controls

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

Index: third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegate.cpp
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegate.cpp b/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegate.cpp
index 71d89b35e4e776ac71a0738f96e19a9387791acd..ca8e1e597b25fa4ecc147382d7a4d53d232a0ee0 100644
--- a/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegate.cpp
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControlsOrientationLockDelegate.cpp
@@ -71,22 +71,26 @@ MediaControlsOrientationLockDelegate::MediaControlsOrientationLockDelegate(
 void MediaControlsOrientationLockDelegate::attach() {
   DCHECK(videoElement().isConnected());
 
-  document().addEventListener(EventTypeNames::fullscreenchange, this, true);
-  videoElement().addEventListener(EventTypeNames::webkitfullscreenchange, this,
-                                  true);
   videoElement().addEventListener(EventTypeNames::loadedmetadata, this, true);
 }
 
 void MediaControlsOrientationLockDelegate::detach() {
   DCHECK(!videoElement().isConnected());
 
-  document().removeEventListener(EventTypeNames::fullscreenchange, this, true);
-  videoElement().removeEventListener(EventTypeNames::webkitfullscreenchange,
-                                     this, true);
   videoElement().removeEventListener(EventTypeNames::loadedmetadata, this,
                                      true);
 }
 
+void MediaControlsOrientationLockDelegate::didEnterFullscreen() {
+  if (m_state == State::PendingFullscreen)
+    maybeLockOrientation();
+}
+
+void MediaControlsOrientationLockDelegate::didExitFullscreen() {
+  if (m_state != State::PendingFullscreen)
+    maybeUnlockOrientation();
+}
+
 bool MediaControlsOrientationLockDelegate::operator==(
     const EventListener& other) const {
   return this == &other;
@@ -151,19 +155,6 @@ Document& MediaControlsOrientationLockDelegate::document() const {
 void MediaControlsOrientationLockDelegate::handleEvent(
     ExecutionContext* executionContext,
     Event* event) {
-  if (event->type() == EventTypeNames::fullscreenchange ||
-      event->type() == EventTypeNames::webkitfullscreenchange) {
-    if (videoElement().isFullscreen()) {
-      if (m_state == State::PendingFullscreen)
-        maybeLockOrientation();
-    } else {
-      if (m_state != State::PendingFullscreen)
-        maybeUnlockOrientation();
-    }
-
-    return;
-  }
-
   if (event->type() == EventTypeNames::loadedmetadata) {
     if (m_state == State::PendingMetadata)
       maybeLockOrientation();