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

content/renderer/presentation/presentation_dispatcher.cc

Index: content/renderer/presentation/presentation_dispatcher.cc
diff --git a/content/renderer/presentation/presentation_dispatcher.cc b/content/renderer/presentation/presentation_dispatcher.cc
index 293b030a88d9bfd911a4f29983d88b82e5d1d423..8485ba1feab8cb7f62e2885c11713b0e9b749bb4 100644
--- a/content/renderer/presentation/presentation_dispatcher.cc
+++ b/content/renderer/presentation/presentation_dispatcher.cc
@@ -16,7 +16,7 @@
 #include "content/renderer/presentation/presentation_connection_client.h"
 #include "services/shell/public/cpp/interface_provider.h"
 #include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/platform/WebURL.h"
+#include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/WebKit/public/platform/modules/presentation/WebPresentationAvailabilityObserver.h"
 #include "third_party/WebKit/public/platform/modules/presentation/WebPresentationController.h"
 #include "third_party/WebKit/public/platform/modules/presentation/WebPresentationError.h"
@@ -100,37 +100,41 @@ void PresentationDispatcher::setController(
 }
 
 void PresentationDispatcher::startSession(
-    const blink::WebString& presentationUrl,
+    const blink::WebVector<blink::WebString>& presentationUrls,
     blink::WebPresentationConnectionClientCallbacks* callback) {
   DCHECK(callback);
   ConnectToPresentationServiceIfNeeded();
 
+  std::vector<std::string> urls(presentationUrls.size());
+  std::transform(presentationUrls.begin(), presentationUrls.end(), urls.begin(),
+                 [](const blink::WebString& url) { return url.utf8(); });
+
   // The dispatcher owns the service so |this| will be valid when
   // OnSessionCreated() is called. |callback| needs to be alive and also needs
   // to be destroyed so we transfer its ownership to the mojo callback.
   presentation_service_->StartSession(
-      presentationUrl.utf8(),
-      base::Bind(&PresentationDispatcher::OnSessionCreated,
-          base::Unretained(this),
-          base::Owned(callback)));
+      urls, base::Bind(&PresentationDispatcher::OnSessionCreated,
+                       base::Unretained(this), base::Owned(callback)));
 }
 
 void PresentationDispatcher::joinSession(
-    const blink::WebString& presentationUrl,
+    const blink::WebVector<blink::WebString>& presentationUrls,
     const blink::WebString& presentationId,
     blink::WebPresentationConnectionClientCallbacks* callback) {
   DCHECK(callback);
   ConnectToPresentationServiceIfNeeded();
 
+  std::vector<std::string> urls(presentationUrls.size());
+  std::transform(presentationUrls.begin(), presentationUrls.end(), urls.begin(),
+                 [](const blink::WebString& url) { return url.utf8(); });
+
   // The dispatcher owns the service so |this| will be valid when
   // OnSessionCreated() is called. |callback| needs to be alive and also needs
   // to be destroyed so we transfer its ownership to the mojo callback.
   presentation_service_->JoinSession(
-      presentationUrl.utf8(),
-      presentationId.utf8(),
+      urls, presentationId.utf8(),
       base::Bind(&PresentationDispatcher::OnSessionCreated,
-          base::Unretained(this),
-          base::Owned(callback)));
+                 base::Unretained(this), base::Owned(callback)));
 }
 
 void PresentationDispatcher::sendString(
@@ -290,10 +294,14 @@ void PresentationDispatcher::stopListening(
   UpdateListeningState(status_it->second.get());
 }
 
-void PresentationDispatcher::setDefaultPresentationUrl(
-    const blink::WebString& url) {
+void PresentationDispatcher::setDefaultPresentationUrls(
+    const blink::WebVector<blink::WebString>& presentationUrls) {
   ConnectToPresentationServiceIfNeeded();
-  presentation_service_->SetDefaultPresentationURL(url.utf8());
+
+  std::vector<std::string> urls(presentationUrls.size());
+  std::transform(presentationUrls.begin(), presentationUrls.end(), urls.begin(),
+                 [](const blink::WebString& url) { return url.utf8(); });
+  presentation_service_->SetDefaultPresentationUrls(urls);
 }
 
 void PresentationDispatcher::DidCommitProvisionalLoad(