Move a few media controls elements into modules/media_controls/elements/.

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

Index: third_party/WebKit/Source/modules/media_controls/elements/MediaControlPanelEnclosureElement.cpp
diff --git a/third_party/WebKit/Source/modules/media_controls/elements/MediaControlPanelEnclosureElement.cpp b/third_party/WebKit/Source/modules/media_controls/elements/MediaControlPanelEnclosureElement.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..00550294e74019fc962e4a62873c96b13edc241d
--- /dev/null
+++ b/third_party/WebKit/Source/modules/media_controls/elements/MediaControlPanelEnclosureElement.cpp
@@ -0,0 +1,17 @@
+// 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/MediaControlPanelEnclosureElement.h"
+
+#include "modules/media_controls/MediaControlsImpl.h"
+
+namespace blink {
+
+MediaControlPanelEnclosureElement::MediaControlPanelEnclosureElement(
+    MediaControlsImpl& media_controls)
+    : MediaControlDivElement(media_controls, kMediaControlsPanel) {
+  SetShadowPseudoId(AtomicString("-webkit-media-controls-enclosure"));
+}
+
+}  // namespace blink