Media Remoting: Add interstitial elements to media element shadow dom.

third_party/WebKit/Source/core/html/shadow/MediaRemotingInterstitial.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 MediaRemotingInterstitial_h
+#define MediaRemotingInterstitial_h
+
+#include "core/html/HTMLDivElement.h"
+
+namespace blink {
+
+class HTMLVideoElement;
+class MediaRemotingDisableButtonElement;
+class MediaRemotingCastIconElement;
+class MediaRemotingBackgroundImageElement;
+class MediaRemotingInterstitialElements;
+
+// Media Remoting UI. DOM structure looks like:
+//
+// MediaRemotingInterstitial
+//     (-internal-media-remoting-interstitial)
+// +-MediaRemotingBackgroundImageElement
+// |   (-internal-media-remoting-background-image)
+// \-MediaRemotingInterstitialElements
+//   | (-internal-media-remoting-interstitial-elements)
+//   \-MediaRemotingCastIconElement
+//     |    (-internal-media-remoting-cast-icon)
+//     \-MediaRemotingDisableButtonElement
+//          (-internal-media-remoting-disable-button)
+class MediaRemotingInterstitial final : public HTMLDivElement {
+ public:
+  explicit MediaRemotingInterstitial(HTMLVideoElement&);
+
+  // Show/Hide Media Remoting interstitial.
+  void show();
+  void hide();
+  bool shouldShow() { return m_shown; }

[mlamouri (slow - plz ping), 2017/04/10 13:44:22]

nit: `const` 

[xjz, 2017/04/11 04:29:44]

This function is removed now.

+  void onPosterImageChanged();
+
+  HTMLVideoElement& videoElement() const { return *m_videoElement; }
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  // Node override.
+  bool isMediaRemotingInterstitial() const override { return true; }
+
+  Member<HTMLVideoElement> m_videoElement;
+  Member<MediaRemotingInterstitialElements> m_interstitialElements;
+  Member<MediaRemotingBackgroundImageElement> m_mediaRemotingBackgroundImage;
+
+  bool m_shown = false;
+};
+
+class MediaRemotingInterstitialElements final : public HTMLDivElement {
+ public:
+  explicit MediaRemotingInterstitialElements(MediaRemotingInterstitial&);
+  void onShown();
+  void onHidden();
+  HTMLVideoElement& videoElement() const;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  Member<MediaRemotingInterstitial> m_interstitial;
+  Member<MediaRemotingDisableButtonElement> m_mediaRemotingDisableButton;
+  Member<MediaRemotingCastIconElement> m_MediaRemotingCastIcon;
+};
+
+}  // namespace
+
+#endif  // MediaRemotingInterstitial_h