[Blink, Media] Added controlsList to HTMLMediaElement

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

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 682 matching lines @@
 
   // HLS stream shouldn't have a download button.
   if (HTMLMediaElement::isHLSURL(url))
     return false;
 
   // Infinite streams don't have a clear end at which to finish the download
   // (would require adding UI to prompt for the duration to download).
   if (mediaElement().duration() == std::numeric_limits<double>::infinity())
     return false;
 
+  // The attribute disables the download button.
+  if (mediaElement().controlsList()->tokens().contains("nodownload"))
+    return false;

[mlamouri (slow - plz ping), 2017/03/03 17:32:44]

Can you add a histogram that reports how many time these are used? Maybe a
UseCounter would be enough.

[whywhat, 2017/03/07 12:59:46]

Done.

+
   return true;
 }
 
 void MediaControlDownloadButtonElement::setIsWanted(bool wanted) {
   MediaControlElement::setIsWanted(wanted);
 
   if (!isWanted())
     return;
 
   DCHECK(isWanted());
@@ skipping 365 matching lines @@
 MediaControlCurrentTimeDisplayElement*
 MediaControlCurrentTimeDisplayElement::create(MediaControls& mediaControls) {
   MediaControlCurrentTimeDisplayElement* element =
       new MediaControlCurrentTimeDisplayElement(mediaControls);
   element->setShadowPseudoId(
       AtomicString("-webkit-media-controls-current-time-display"));
   return element;
 }
 
 }  // namespace blink