Media Controls: move all MediaControlDivElement sub-classes to modules/.

third_party/WebKit/Source/modules/media_controls/elements/MediaControlElementsHelper.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/media_controls/elements/MediaControlElementsHelper.h"
+
+#include "core/events/Event.h"
+
+namespace blink {
+
+// static
+bool MediaControlElementsHelper::IsUserInteractionEvent(Event* event) {
+  const AtomicString& type = event->type();
+  return type == EventTypeNames::mousedown || type == EventTypeNames::mouseup ||
+         type == EventTypeNames::click || type == EventTypeNames::dblclick ||
+         event->IsKeyboardEvent() || event->IsTouchEvent();

[whywhat, 2017/04/12 15:36:41]

q: would isTouchEvent() return true if I fling over the media element when
scrolling the page and happen to touch one of the controls? Some touch events
are not considered to be user gesture anymore, right?

[mlamouri (slow - plz ping), 2017/04/13 21:59:54]

It's not meant to check for user gesture but user interaction. This code was
added by aberent@ IIRC. The purpose is to prevent some events from being seen
outside the media controls shadow DOM IIRC. It should be re-written to use
pointer events IMO.

+}
+
+}  // namespace blink