[Presentation API] Add support to content/ for multiple URLs per PresentationRequest.

content/browser/presentation/presentation_service_impl.h

Index: content/browser/presentation/presentation_service_impl.h
diff --git a/content/browser/presentation/presentation_service_impl.h b/content/browser/presentation/presentation_service_impl.h
index e6e21088ef29af26628d5b224bee06521114fb1a..759e010c3559a0fa5da65a79f24d4ffc6f90abbb 100644
--- a/content/browser/presentation/presentation_service_impl.h
+++ b/content/browser/presentation/presentation_service_impl.h
@@ -9,6 +9,7 @@
 #include <map>
 #include <memory>
 #include <string>
+#include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ -72,11 +73,11 @@ class CONTENT_EXPORT PresentationServiceImpl
       OtherRenderFrameDeleted);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest, DelegateFails);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
-      SetDefaultPresentationUrl);
+                           SetDefaultPresentationUrls);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
-      SetSameDefaultPresentationUrl);
+                           SetSameDefaultPresentationUrls);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
-      ClearDefaultPresentationUrl);
+                           ClearDefaultPresentationUrls);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
       ListenForDefaultSessionStart);
   FRIEND_TEST_ALL_PREFIXES(PresentationServiceImplTest,
@@ -150,13 +151,14 @@ class CONTENT_EXPORT PresentationServiceImpl
       PresentationServiceDelegate* delegate);
 
   // PresentationService implementation.
-  void SetDefaultPresentationURL(const std::string& url) override;
+  void SetDefaultPresentationUrls(
+      const std::vector<std::string>& presentation_urls) override;
   void SetClient(blink::mojom::PresentationServiceClientPtr client) override;
   void ListenForScreenAvailability(const std::string& url) override;
   void StopListeningForScreenAvailability(const std::string& url) override;
-  void StartSession(const std::string& presentation_url,
+  void StartSession(const std::vector<std::string>& presentation_urls,
                     const NewSessionCallback& callback) override;
-  void JoinSession(const std::string& presentation_url,
+  void JoinSession(const std::vector<std::string>& presentation_urls,
                    const base::Optional<std::string>& presentation_id,
                    const NewSessionCallback& callback) override;
   void SendSessionMessage(blink::mojom::PresentationSessionInfoPtr session_info,
@@ -253,7 +255,7 @@ class CONTENT_EXPORT PresentationServiceImpl
   // availability) to.
   blink::mojom::PresentationServiceClientPtr client_;
 
-  std::string default_presentation_url_;
+  std::vector<std::string> default_presentation_urls_;
 
   using ScreenAvailabilityListenerMap =
       std::map<std::string, std::unique_ptr<ScreenAvailabilityListenerImpl>>;