Remove MediaControls methods needed for the Cast button

third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h

Index: third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
diff --git a/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h b/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
index 4b328004ab74680e393cdf0dbacfdb852607dd2a..65b7a6060fd15bab1be91043466cc089f0fef0fa 100644
--- a/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
+++ b/third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.h
@@ -13,6 +13,7 @@
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
 #include "platform/wtf/Compiler.h"
+#include "platform/wtf/Functional.h"
 #include "platform/wtf/text/AtomicString.h"
 #include "platform/wtf/text/WTFString.h"
 #include "public/platform/modules/remoteplayback/WebRemotePlaybackAvailability.h"
@@ -71,14 +72,45 @@ class MODULES_EXPORT RemotePlayback final
   DEFINE_ATTRIBUTE_EVENT_LISTENER(disconnect);
 
   DECLARE_VIRTUAL_TRACE();
-  DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
  private:
+  friend class MediaControlCastButtonElement;
   friend class V8RemotePlayback;
   friend class RemotePlaybackTest;
 
+  // Wraps either a WTF::Closure or RemotePlaybackAvailabilityCallback object
+  // to be kept in the |availability_callbacks_| map.
+  class AvailabilityCallback final
+      : public GarbageCollectedFinalized<AvailabilityCallback> {
+    WTF_MAKE_NONCOPYABLE(AvailabilityCallback);
+
+   public:
+    explicit AvailabilityCallback(RemotePlaybackAvailabilityCallback*);
+    explicit AvailabilityCallback(std::unique_ptr<WTF::Closure>);
+    ~AvailabilityCallback() = default;
+
+    void Run(RemotePlayback*, bool new_availability);
+
+    DECLARE_VIRTUAL_TRACE_WRAPPERS();
+    DEFINE_INLINE_VIRTUAL_TRACE() {}
+
+   private:
+    // Only one of these members must be set.
+    TraceWrapperMember<RemotePlaybackAvailabilityCallback> bindings_cb_;
+    std::unique_ptr<WTF::Closure> internal_cb_;
+  };
+
   explicit RemotePlayback(HTMLMediaElement&);
 
+  // The implementation of prompt(). Used by the native remote playback button.
+  void PromptInternal();
+
+  // The implementation of watchAvailability() and cancelWatchAvailability().
+  int WatchAvailabilityInternal(AvailabilityCallback*);
+  bool CancelWatchAvailabilityInternal(int id);
+
+  WebRemotePlaybackState GetState() const { return state_; }
+
   // Calls the specified availability callback with the current availability.
   // Need a void() method to post it as a task.
   void NotifyInitialAvailability(int callback_id);
@@ -91,8 +123,7 @@ class MODULES_EXPORT RemotePlayback final
 
   WebRemotePlaybackState state_;
   WebRemotePlaybackAvailability availability_;
-  HeapHashMap<int, TraceWrapperMember<RemotePlaybackAvailabilityCallback>>
-      availability_callbacks_;
+  HeapHashMap<int, Member<AvailabilityCallback>> availability_callbacks_;
   Member<HTMLMediaElement> media_element_;
   Member<ScriptPromiseResolver> prompt_promise_resolver_;
 };