Presentation API: ignore presentation id passed to startSession().

content/renderer/presentation/presentation_dispatcher.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/presentation/presentation_dispatcher.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 96 matching lines @@
   if (watched)
     presentation_service_->ListenForScreenAvailability();
   else
     presentation_service_->StopListeningForScreenAvailability();
 }
 
 void PresentationDispatcher::startSession(
     const blink::WebString& presentationUrl,
     const blink::WebString& presentationId,
     blink::WebPresentationSessionClientCallbacks* callback) {
+  startSession(presentationUrl, callback);
+}
+
+void PresentationDispatcher::startSession(
+    const blink::WebString& presentationUrl,
+    blink::WebPresentationSessionClientCallbacks* callback) {
   DCHECK(callback);
   ConnectToPresentationServiceIfNeeded();
 
   // 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(),
-      presentationId.utf8(),
       base::Bind(&PresentationDispatcher::OnSessionCreated,
           base::Unretained(this),
           base::Owned(callback)));
 }
 
 void PresentationDispatcher::joinSession(
     const blink::WebString& presentationUrl,
     const blink::WebString& presentationId,
     blink::WebPresentationSessionClientCallbacks* callback) {
   DCHECK(callback);
@@ skipping 340 matching lines @@
   if (should_listen) {
     listening_state_ = ListeningState::Waiting;
     presentation_service_->ListenForScreenAvailability();
   } else {
     listening_state_ = ListeningState::Inactive;
     presentation_service_->StopListeningForScreenAvailability();
   }
 }
 
 }  // namespace content