[Presentation API] (4th)(1-UA blink side) Add WebPresentationConnection and WebPresentationConnecti…

third_party/WebKit/Source/modules/presentation/ExistingPresentationConnectionCallbacks.h

 // Copyright 2015 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 ExistingPresentationConnectionCallbacks_h
 #define ExistingPresentationConnectionCallbacks_h
 
 #include "platform/heap/Handle.h"
 #include "public/platform/WebCallbacks.h"
+#include "public/platform/modules/presentation/WebPresentationConnectionCallbacks.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class PresentationConnection;
 class ScriptPromiseResolver;
 struct WebPresentationError;
 struct WebPresentationSessionInfo;
 
 // ExistingPresentationConnectionCallbacks extends WebCallbacks to resolve the
 // underlying promise. It takes the PresentationConnection object that
 // originated the call in its constructor and will resolve underlying promise
 // with that object.
+// TODO(zhaobin): combine this class with PresentationConnectionCallbacks.
 class ExistingPresentationConnectionCallbacks final
-    : public WebCallbacks<const WebPresentationSessionInfo&,
-                          const WebPresentationError&> {
+    : public WebPresentationConnectionCallbacks {
  public:
   ExistingPresentationConnectionCallbacks(ScriptPromiseResolver*,
                                           PresentationConnection*);
   ~ExistingPresentationConnectionCallbacks() override = default;
 
+  // WebCallbacks implementation
   void onSuccess(const WebPresentationSessionInfo&) override;
   void onError(const WebPresentationError&) override;
 
+  // WebPresentationConnectionCallbacks implementation
+  WebPresentationConnection* getConnection() override;
+
  private:
   Persistent<ScriptPromiseResolver> m_resolver;
   Persistent<PresentationConnection> m_connection;
 
   WTF_MAKE_NONCOPYABLE(ExistingPresentationConnectionCallbacks);
 };
 
 }  // namespace blink
 
 #endif  // ExistingPresentationConnectionCallbacks_h