Media Controls: move last buttons to modules/.

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

+// 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 MediaControlDownloadButtonElement_h
+#define MediaControlDownloadButtonElement_h
+
+#include "core/html/shadow/MediaControlElementTypes.h"
+
+namespace blink {
+
+class Event;
+class MediaControlsImpl;
+
+class MediaControlDownloadButtonElement final
+    : public MediaControlInputElement {
+ public:
+  explicit MediaControlDownloadButtonElement(MediaControlsImpl&);
+
+  // Returns true if the download button should be shown. We should
+  // show the button for only non-MSE, non-EME, and non-MediaStream content.
+  bool ShouldDisplayDownloadButton();
+
+  // MediaControlInputElement overrides.
+  // TODO(mlamouri): add WillRespondToMouseClickEvents
+  WebLocalizedString::Name GetOverflowStringName() override;
+  bool HasOverflowButton() override;
+  void SetIsWanted(bool) override;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  // This is used for UMA histogram (Media.Controls.Download). New values should
+  // be appended only and must be added before |Count|.
+  enum class DownloadActionMetrics {
+    kShown = 0,
+    kClicked,
+    kCount  // Keep last.
+  };
+
+  void DefaultEventHandler(Event*) override;
+
+  void RecordMetrics(DownloadActionMetrics);
+
+  // Points to an anchor element that contains the URL of the media file.
+  Member<HTMLAnchorElement> anchor_;
+
+  // UMA related boolean. They are used to prevent counting something twice
+  // for the same media element.
+  bool click_use_counted_ = false;
+  bool show_use_counted_ = false;
+};
+
+}  // namespace blink
+
+#endif  // MediaControlDownloadButtonElement_h