[Presentation API] (1st) (1-UA) Add is_offscreen_presentation attribute to MediaRouter

chrome/browser/media/router/presentation_service_delegate_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 "chrome/browser/media/router/presentation_service_delegate_impl.h"
 
 #include <string>
 #include <unordered_map>
 #include <utility>
 #include <vector>
@@ skipping 738 matching lines @@
         result.route()->media_route_id());
     success_cb.Run(session);
   }
 }
 
 void PresentationServiceDelegateImpl::OnStartSessionSucceeded(
     int render_process_id,
     int render_frame_id,
     const content::PresentationSessionStartedCallback& success_cb,
     const content::PresentationSessionInfo& new_session,
-    const MediaRoute::Id& route_id) {
+    const MediaRoute& route) {
+  const MediaRoute::Id& route_id = route.media_route_id();
   DVLOG(1) << "OnStartSessionSucceeded: "
            << "route_id: " << route_id
            << ", presentation URL: " << new_session.presentation_url
-           << ", presentation ID: " << new_session.presentation_id;
+           << ", presentation ID: " << new_session.presentation_id
+           << ", is_offscreen_presentation: " << new_session.is_offscreen;
   frame_manager_->OnPresentationSessionStarted(
       RenderFrameHostId(render_process_id, render_frame_id), new_session,
       route_id);

[mark a. foltz, 2016/11/03 18:32:05]

Would be nice to pass |route| here instead of |route_id|.  Optional cleanup to
do in this patch.

[zhaobin, 2016/11/03 23:00:46]

Will do it in a seperate CL. |route_id| used in lots of place, create a bug to
track this: https://bugs.chromium.org/p/chromium/issues/detail?id=662208# 

   success_cb.Run(new_session);
 }
 
 void PresentationServiceDelegateImpl::StartSession(
     int render_process_id,
     int render_frame_id,
     const std::vector<GURL>& presentation_urls,
     const content::PresentationSessionStartedCallback& success_cb,
     const content::PresentationSessionErrorCallback& error_cb) {
   if (presentation_urls.empty()) {
@@ skipping 184 matching lines @@
 bool PresentationServiceDelegateImpl::HasScreenAvailabilityListenerForTest(
     int render_process_id,
     int render_frame_id,
     const MediaSource::Id& source_id) const {
   RenderFrameHostId render_frame_host_id(render_process_id, render_frame_id);
   return frame_manager_->HasScreenAvailabilityListenerForTest(
       render_frame_host_id, source_id);
 }
 
 }  // namespace media_router