[Presentation API] Resolve PresentationRequest::reconnect() with existing presentation connection i…

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

Index: third_party/WebKit/Source/modules/presentation/PresentationConnectionCallbacks.h
diff --git a/third_party/WebKit/Source/modules/presentation/PresentationConnectionCallbacks.h b/third_party/WebKit/Source/modules/presentation/PresentationConnectionCallbacks.h
index 257e50b0396558caa43a2b458732e9bea2676a15..53670554cc2646e7cc8a4b6c2f925fdd71ad17e2 100644
--- a/third_party/WebKit/Source/modules/presentation/PresentationConnectionCallbacks.h
+++ b/third_party/WebKit/Source/modules/presentation/PresentationConnectionCallbacks.h
@@ -11,6 +11,7 @@
 
 namespace blink {
 
+class PresentationConnection;
 class PresentationRequest;
 class ScriptPromiseResolver;
 class WebPresentationConnectionClient;
@@ -37,6 +38,28 @@ class PresentationConnectionCallbacks final
   WTF_MAKE_NONCOPYABLE(PresentationConnectionCallbacks);
 };
 
+// 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.
+class ExistingPresentationConnectionCallbacks final
+    : public WebCallbacks<std::unique_ptr<WebPresentationConnectionClient>,
+                          const WebPresentationError&> {
+ public:
+  ExistingPresentationConnectionCallbacks(ScriptPromiseResolver*,
+                                          PresentationConnection*);
+  ~ExistingPresentationConnectionCallbacks() override = default;
+
+  void onSuccess(std::unique_ptr<WebPresentationConnectionClient>) override;
+  void onError(const WebPresentationError&) override;
+
+ private:
+  Persistent<ScriptPromiseResolver> m_resolver;
+  Persistent<PresentationConnection> m_connection;
+
+  WTF_MAKE_NONCOPYABLE(ExistingPresentationConnectionCallbacks);
+};
+
 }  // namespace blink
 
 #endif  // PresentationConnectionCallbacks_h