Revert "Make scrubbing a MediaControls-internal concept"

Source/core/html/MediaController.cpp

Index: Source/core/html/MediaController.cpp
diff --git a/Source/core/html/MediaController.cpp b/Source/core/html/MediaController.cpp
index a4143250994c2a7be49dbeefe96c33d8786b3ab1..d2b33ea7b5e33659c0ab5af89e55c66c0b18ab95 100644
--- a/Source/core/html/MediaController.cpp
+++ b/Source/core/html/MediaController.cpp
@@ -607,6 +607,22 @@ void MediaController::clearPositionTimerFired(Timer<MediaController>*)
     m_position = MediaPlayer::invalidTime();
 }
 
+void MediaController::beginScrubbing()
+{
+    for (size_t index = 0; index < m_mediaElements.size(); ++index)
+        m_mediaElements[index]->beginScrubbing();
+    if (m_playbackState == PLAYING)
+        m_clock->stop();
+}
+
+void MediaController::endScrubbing()
+{
+    for (size_t index = 0; index < m_mediaElements.size(); ++index)
+        m_mediaElements[index]->endScrubbing();
+    if (m_playbackState == PLAYING)
+        m_clock->start();
+}
+
 const AtomicString& MediaController::interfaceName() const
 {
     return EventTargetNames::MediaController;