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

content/public/browser/presentation_service_delegate.h

Index: content/public/browser/presentation_service_delegate.h
diff --git a/content/public/browser/presentation_service_delegate.h b/content/public/browser/presentation_service_delegate.h
index cb1725bf763ddac7e11cd82822f1f73e194c9be0..eac0c3df9a5886b38953cdff233269087d748eaf 100644
--- a/content/public/browser/presentation_service_delegate.h
+++ b/content/public/browser/presentation_service_delegate.h
@@ -107,24 +107,24 @@ class CONTENT_EXPORT PresentationServiceDelegate {
       int render_process_id,
       int render_frame_id) = 0;
 
-  // Sets the default presentation URL for frame given by |render_process_id|
+  // Sets the default presentation URLs for frame given by |render_process_id|
   // and |render_frame_id|. When the default presentation is started on this
   // frame, |callback| will be invoked with the corresponding
   // PresentationSessionInfo object.
-  // If |default_presentation_url| is empty, the default presentation URL will
+  // If |default_presentation_urls| is empty, the default presentation URLs will
   // be cleared and the previously registered callback (if any) will be removed.
-  virtual void SetDefaultPresentationUrl(
+  virtual void SetDefaultPresentationUrls(
       int render_process_id,
       int render_frame_id,
-      const std::string& default_presentation_url,
+      const std::vector<std::string>& default_presentation_urls,
       const PresentationSessionStartedCallback& callback) = 0;
 
   // Starts a new presentation session. The presentation id of the session will
   // be the default presentation ID if any or a generated one otherwise.
   // Typically, the embedder will allow the user to select a screen to show
-  // |presentation_url|.
+  // one of the |presentation_urls|.
   // |render_process_id|, |render_frame_id|: ID of originating frame.
-  // |presentation_url|: URL of the presentation.
+  // |presentation_urls|: Possible URLs for the presentation.
   // |success_cb|: Invoked with session info, if presentation session started
   // successfully.
   // |error_cb|: Invoked with error reason, if presentation session did not
@@ -132,14 +132,14 @@ class CONTENT_EXPORT PresentationServiceDelegate {
   virtual void StartSession(
       int render_process_id,
       int render_frame_id,
-      const std::string& presentation_url,
+      const std::vector<std::string>& presentation_urls,
       const PresentationSessionStartedCallback& success_cb,
       const PresentationSessionErrorCallback& error_cb) = 0;
 
   // Joins an existing presentation session. Unlike StartSession(), this
   // does not bring a screen list UI.
   // |render_process_id|, |render_frame_id|: ID for originating frame.
-  // |presentation_url|: URL of the presentation.
+  // |presentation_urls|: Possible URLs of the presentation.
   // |presentation_id|: The ID of the presentation to join.
   // |success_cb|: Invoked with session info, if presentation session joined
   // successfully.
@@ -147,7 +147,7 @@ class CONTENT_EXPORT PresentationServiceDelegate {
   virtual void JoinSession(
       int render_process_id,
       int render_frame_id,
-      const std::string& presentation_url,
+      const std::vector<std::string>& presentation_urls,
       const std::string& presentation_id,
       const PresentationSessionStartedCallback& success_cb,
       const PresentationSessionErrorCallback& error_cb) = 0;