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

third_party/WebKit/Source/modules/media_controls/elements/MediaControlMuteButtonElement.h

Index: third_party/WebKit/Source/modules/media_controls/elements/MediaControlMuteButtonElement.h
diff --git a/third_party/WebKit/Source/modules/media_controls/elements/MediaControlMuteButtonElement.h b/third_party/WebKit/Source/modules/media_controls/elements/MediaControlMuteButtonElement.h
new file mode 100644
index 0000000000000000000000000000000000000000..c70fd28a98534387b9635e0cbb48c24133760304
--- /dev/null
+++ b/third_party/WebKit/Source/modules/media_controls/elements/MediaControlMuteButtonElement.h
@@ -0,0 +1,31 @@
+// 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.
+
+#ifndef MediaControlMuteButtonElement_h
+#define MediaControlMuteButtonElement_h
+
+#include "core/html/shadow/MediaControlElementTypes.h"
+
+namespace blink {
+
+class Event;
+class MediaControlsImpl;
+
+class MediaControlMuteButtonElement final : public MediaControlInputElement {
+ public:
+  explicit MediaControlMuteButtonElement(MediaControlsImpl&);
+
+  // MediaControlInputElement overrides.
+  bool WillRespondToMouseClickEvents() override;
+  void UpdateDisplayType() override;
+  WebLocalizedString::Name GetOverflowStringName() override;
+  bool HasOverflowButton() override;
+
+ private:
+  void DefaultEventHandler(Event*) override;
+};
+
+}  // namespace blink
+
+#endif  // MediaControlMuteButtonElement_h