Remove MediaControls methods needed for the Cast button

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

Index: third_party/WebKit/Source/modules/media_controls/elements/MediaControlCastButtonElement.h
diff --git a/third_party/WebKit/Source/modules/media_controls/elements/MediaControlCastButtonElement.h b/third_party/WebKit/Source/modules/media_controls/elements/MediaControlCastButtonElement.h
index c640a8e01091c018eb116d0ac4552c3963fbad6b..902785732efb00f6b92f9eab2d97f76f059c31d6 100644
--- a/third_party/WebKit/Source/modules/media_controls/elements/MediaControlCastButtonElement.h
+++ b/third_party/WebKit/Source/modules/media_controls/elements/MediaControlCastButtonElement.h
@@ -5,7 +5,9 @@
 #ifndef MediaControlCastButtonElement_h
 #define MediaControlCastButtonElement_h
 
+#include "core/events/EventListener.h"
 #include "core/html/shadow/MediaControlElementTypes.h"
+#include "modules/remoteplayback/RemotePlayback.h"
 
 namespace blink {
 
@@ -16,18 +18,22 @@ class MediaControlCastButtonElement final : public MediaControlInputElement {
  public:
   MediaControlCastButtonElement(MediaControlsImpl&, bool is_overlay_button);
 
-  // This will show a cast button if it is not covered by another element.
-  // This MUST be called for cast button elements that are overlay elements.
-  void TryShowOverlay();
-
-  void SetIsPlayingRemotely(bool);
+  // If set to true, will show the button as long as the media element can be
+  // played remotely (and the button is not covered by another element, if it's
+  // an overlay). Will hide the button and stop watching for remote playback
+  // availability if set to false.
+  void SetIsWanted(bool) override;
 
   // MediaControlInputElement overrides.
   bool WillRespondToMouseClickEvents() override;
   WebLocalizedString::Name GetOverflowStringName() override;
   bool HasOverflowButton() override;
 
+  DECLARE_VIRTUAL_TRACE();
+
  private:
+  friend class MediaControlsImpl;
+
   // This is used for UMA histogram (Cast.Sender.Overlay). New values should
   // be appended only and must be added before |Count|.
   enum class CastOverlayMetrics {
@@ -40,14 +46,33 @@ class MediaControlCastButtonElement final : public MediaControlInputElement {
   void DefaultEventHandler(Event*) override;
   bool KeepEventInNode(Event*) override;
 
+  // Whether the media element is being played remotely at the moment.
+  bool IsPlayingRemotely() const;
+
+  // Returns the element currently layed out under the center of the button.
+  Element* UnderlyingElement();
+
+  // Updates the way the button is displayed (connected or not, overlay or not).
+  void UpdateDisplayType();
+
+  // Returns true if the button can be shown at the moment it's called.
+  // Not const for implementation reasons.
+  bool ShouldShow();
+
   void RecordMetrics(CastOverlayMetrics);
 
   bool is_overlay_button_;
 
+  // Keeps track of whether the button needs to be shown from the
+  // MediaControlsImpl perspective.
+  bool is_wanted_by_controls_ = false;
+
   // 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;
+
+  Member<RemotePlayback> remote_playback_;
 };
 
 }  // namespace blink