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

content/browser/presentation/presentation_service_impl.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/browser/presentation/presentation_service_impl.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "content/browser/presentation/presentation_type_converters.h"
@@ skipping 215 matching lines @@
 
 void PresentationServiceImpl::ListenForDefaultSessionStart(
     const DefaultSessionMojoCallback& callback) {
   if (!default_session_start_context_.get())
     default_session_start_context_.reset(new DefaultSessionStartContext);
   default_session_start_context_->AddCallback(callback);
 }
 
 void PresentationServiceImpl::StartSession(
     const mojo::String& presentation_url,
-    const mojo::String& presentation_id,
     const NewSessionMojoCallback& callback) {
   DVLOG(2) << "StartSession";
   if (!delegate_) {
     InvokeNewSessionMojoCallbackWithError(callback);
     return;
   }
 
   // There is a StartSession request in progress. To avoid queueing up
   // requests, the incoming request is rejected.
   if (start_session_request_id_ != kInvalidRequestSessionId) {
     InvokeNewSessionMojoCallbackWithError(callback);
     return;
   }
 
   start_session_request_id_ = GetNextRequestSessionId();
   pending_start_session_cb_.reset(new NewSessionMojoCallbackWrapper(callback));
   delegate_->StartSession(
-      render_process_id_, render_frame_id_, presentation_url, presentation_id,
+      render_process_id_, render_frame_id_, presentation_url,
       base::Bind(&PresentationServiceImpl::OnStartSessionSucceeded,
                  weak_factory_.GetWeakPtr(), start_session_request_id_),
       base::Bind(&PresentationServiceImpl::OnStartSessionError,
                  weak_factory_.GetWeakPtr(), start_session_request_id_));
 }
 
 void PresentationServiceImpl::JoinSession(
     const mojo::String& presentation_url,
     const mojo::String& presentation_id,
     const NewSessionMojoCallback& callback) {
@@ skipping 367 matching lines @@
 
 void PresentationServiceImpl::DefaultSessionStartContext::Reset() {
   ScopedVector<DefaultSessionMojoCallback> callbacks;
   callbacks.swap(callbacks_);
   for (const auto& callback : callbacks)
     callback->Run(presentation::PresentationSessionInfoPtr());
   session_.reset();
 }
 
 }  // namespace content
-