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

third_party/WebKit/public/platform/modules/presentation/presentation.mojom

Index: third_party/WebKit/public/platform/modules/presentation/presentation.mojom
diff --git a/third_party/WebKit/public/platform/modules/presentation/presentation.mojom b/third_party/WebKit/public/platform/modules/presentation/presentation.mojom
index cb5ce871cae6e63cb4357df4f6595aaa283a80ee..2c5943756fed092c6ee6f68d11568a97222dec00 100644
--- a/third_party/WebKit/public/platform/modules/presentation/presentation.mojom
+++ b/third_party/WebKit/public/platform/modules/presentation/presentation.mojom
@@ -52,20 +52,20 @@ interface PresentationService {
   // Sets the PresentationServiceClient.
   SetClient(PresentationServiceClient client);
 
-  // Called when the frame sets or changes the default presentation URL.
+  // Called when the frame sets or changes the default presentation URLs.
   // When the default presentation is started on this frame,
   // PresentationServiceClient::OnDefaultSessionStarted will be invoked.
-  SetDefaultPresentationURL(string url);
+  SetDefaultPresentationUrls(array<string> presentation_urls);

[dcheng, 2016/07/30 10:21:03]

Please pass URLs as URL types. For Mojo, that is url.mojom.Url. This gets type
mapped to GURL in Chromium and KURL in Blink.

[mark a. foltz, 2016/08/29 23:54:54]

Done.

 
   // Starts listening for screen availability for presentation of
-  // |url|. Availability results will be returned to the client via
+  // |availability_url|. Availability results will be returned to the client via
   // PresentationServiceClient::OnScreenAvailabilityUpdated.
-  ListenForScreenAvailability(string url);
+  ListenForScreenAvailability(string availability_url);
 
   // Stops listening for screen availability for the presentation of |url|. The
   // PresentationServiceClient will stop receiving availability updates for
   // |url|.
-  StopListeningForScreenAvailability(string url);
+  StopListeningForScreenAvailability(string availability_url);
 
   // Called when startSession() is called by the frame. The result callback
   // will return a non-null and valid PresentationSessionInfo if starting the
@@ -76,14 +76,14 @@ interface PresentationService {
   // If the UA identifies a matching session (same presentation url), the user
   // may choose this existing session and the page will join it rather than get
   // a new one.
-  StartSession(string presentation_url)
+  StartSession(array<string> presentation_urls)
       => (PresentationSessionInfo? sessionInfo, PresentationError? error);
 
   // Called when joinSession() is called by the frame. The result callback
   // works the same as for the method above. JoinSession will join a known
   // session (i.e. when the page navigates or the user opens another tab)
   // silently and without user action.
-  JoinSession(string presentation_url, string? presentation_id)
+  JoinSession(array<string> presentation_urls, string? presentation_id)
       => (PresentationSessionInfo? sessionInfo, PresentationError? error);
 
   // Called when send() is called by the frame. The true in the