Revert "Make scrubbing a MediaControls-internal concept"

Source/core/html/HTMLMediaElement.cpp

Index: Source/core/html/HTMLMediaElement.cpp
diff --git a/Source/core/html/HTMLMediaElement.cpp b/Source/core/html/HTMLMediaElement.cpp
index e3552279e73c85d31676bb58f87f3071accbc726..71f7cd42d6c3c4502ab4bc5fc5b20eb5d844cf59 100644
--- a/Source/core/html/HTMLMediaElement.cpp
+++ b/Source/core/html/HTMLMediaElement.cpp
@@ -2138,6 +2138,33 @@ void HTMLMediaElement::setMuted(bool muted)
     scheduleEvent(EventTypeNames::volumechange);
 }
 
+void HTMLMediaElement::beginScrubbing()
+{
+    WTF_LOG(Media, "HTMLMediaElement::beginScrubbing - paused() is %s", boolString(paused()));
+
+    if (!paused()) {
+        if (ended()) {
+            // Because a media element stays in non-paused state when it reaches end, playback resumes
+            // when the slider is dragged from the end to another position unless we pause first. Do
+            // a "hard pause" so an event is generated, since we want to stay paused after scrubbing finishes.
+            pause();
+        } else {
+            // Not at the end but we still want to pause playback so the media engine doesn't try to
+            // continue playing during scrubbing. Pause without generating an event as we will
+            // unpause after scrubbing finishes.
+            setPausedInternal(true);
+        }
+    }
+}
+
+void HTMLMediaElement::endScrubbing()
+{
+    WTF_LOG(Media, "HTMLMediaElement::endScrubbing - m_pausedInternal is %s", boolString(m_pausedInternal));
+
+    if (m_pausedInternal)
+        setPausedInternal(false);
+}
+
 // The spec says to fire periodic timeupdate events (those sent while playing) every
 // "15 to 250ms", we choose the slowest frequency
 static const double maxTimeupdateEventFrequency = 0.25;