Support text track selection in video controls

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 d970453a0d86580201289e48f1229c31ec8e083d..d8821addf3e52abb1b01efa7908240fb52ec62d1 100644
--- a/Source/core/html/HTMLMediaElement.cpp
+++ b/Source/core/html/HTMLMediaElement.cpp
@@ -349,6 +349,7 @@ HTMLMediaElement::HTMLMediaElement(const QualifiedName& tagName, Document& docum
     , m_closedCaptionsVisible(false)
     , m_completelyLoaded(false)
     , m_havePreparedToPlay(false)
+    , m_didPerformAutomaticTrackSelection(false)
     , m_tracksAreReady(true)
     , m_haveVisibleTextTrack(false)
     , m_processingPreferenceChange(false)
@@ -1167,6 +1168,11 @@ void HTMLMediaElement::textTrackModeChanged(TextTrack* track)
     textTracks()->scheduleChangeEvent();
 }
 
+void HTMLMediaElement::disableAutomaticTextTrackSelection()
+{
+    m_didPerformAutomaticTrackSelection = true;
+}
+
 bool HTMLMediaElement::isSafeToLoadURL(const KURL& url, InvalidURLAction actionIfInvalid)
 {
     if (!url.isValid()) {
@@ -2481,6 +2487,9 @@ void HTMLMediaElement::honorUserPreferencesForAutomaticTextTrackSelection()
     if (!m_textTracks || !m_textTracks->length())
         return;
 
+    if (m_didPerformAutomaticTrackSelection)
+        return;
+
     AutomaticTrackSelection::Configuration configuration;
     if (m_processingPreferenceChange)
         configuration.disableCurrentlyEnabledTracks = true;