[Android, Media] Don't unlock MediaStream elements; instead allow MS to autoplay without a gesture.

third_party/WebKit/Source/core/html/HTMLMediaElement.h

Index: third_party/WebKit/Source/core/html/HTMLMediaElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLMediaElement.h b/third_party/WebKit/Source/core/html/HTMLMediaElement.h
index 653bd31414424e201ea67841db7031fe26075257..9b94fee5c0c00a0777827929c2691abc2c22d260 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.h
@@ -462,6 +462,13 @@ private:
     // m_helper and give it a reason.
     void unlockUserGesture();
 
+    // Restores the user gesture requirement for the media element.
+    void lockUserGesture();
+
+    // Returns true if and only if the media element should require user
+    // gesture to unlock within the specified document.
+    bool needToLockPendingUserGesture(const Document&) const;
+
     // Return true if and only if a user gesture is requried for playback.  Even
     // if isLockedPendingUserGesture() return true, this might return false if
     // the requirement is currently overridden.  This does not check if a user
@@ -587,6 +594,7 @@ private:
     bool m_playingRemotely : 1;
     // Whether this element is in overlay fullscreen mode.
     bool m_inOverlayFullscreenVideo : 1;
+    bool m_unlockedUserGestureForMediaStream : 1;

[foolip, 2016/06/22 15:25:56]

more state bits :)

 
     Member<AudioTrackList> m_audioTracks;
     Member<VideoTrackList> m_videoTracks;