[Presentation API] (MR side) 1-UA: notify receiver page when receiver connection becomes available

chrome/browser/chrome_content_browser_client.cc

 // Copyright (c) 2012 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/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 303 matching lines @@
 
 #if defined(ENABLE_WEBRTC)
 #include "chrome/browser/media/audio_debug_recordings_handler.h"
 #include "chrome/browser/media/webrtc/webrtc_event_log_handler.h"
 #include "chrome/browser/media/webrtc/webrtc_logging_handler_host.h"
 #endif
 
 #if defined(ENABLE_MEDIA_ROUTER)
 #include "chrome/browser/media/router/media_router_feature.h"
 #include "chrome/browser/media/router/presentation_service_delegate_impl.h"
+#include "chrome/browser/media/router/receiver_presentation_service_delegate_impl.h"
 #endif
 
 #if defined(ENABLE_WAYLAND_SERVER)
 #include "chrome/browser/chrome_browser_main_extra_parts_exo.h"
 #endif
 
 #if defined(ENABLE_MOJO_MEDIA)
 #include "chrome/browser/media/output_protection_impl.h"
 #endif
 
@@ skipping 2662 matching lines @@
   Navigate(&nav_params);
   callback.Run(nav_params.target_contents);
 #endif
 }
 
 content::PresentationServiceDelegate*
 ChromeContentBrowserClient::GetPresentationServiceDelegate(
       content::WebContents* web_contents) {
 #if defined(ENABLE_MEDIA_ROUTER)
   if (media_router::MediaRouterEnabled(web_contents->GetBrowserContext())) {
+    // ReceiverPresentationServiceDelegateImpl are for WebContents created for

[mark a. foltz, 2016/10/04 00:32:20]

...exist only for WebContents

[zhaobin, 2016/10/04 02:42:59]

Done.

+    // offscreen presentations. The WebContents is from an incognito profile.

[mark a. foltz, 2016/10/04 00:32:20]

The WebContents must belong to an...

[zhaobin, 2016/10/04 02:42:59]

Done.

+    if (auto* impl = media_router::ReceiverPresentationServiceDelegateImpl::

[mark a. foltz, 2016/10/04 00:32:20]

Does this imply that the same WebContents cannot be a presentation receiver and
a presentation controller?

This is not something we plan on supporting in the near term, but might be worth
adding to the note above.

[zhaobin, 2016/10/04 02:42:59]

Done.

+            FromWebContents(web_contents)) {
+      DCHECK(web_contents->GetBrowserContext()->IsOffTheRecord());
+      return impl;
+    }
     return media_router::PresentationServiceDelegateImpl::
         GetOrCreateForWebContents(web_contents);
   }
 #endif  // defined(ENABLE_MEDIA_ROUTER)
   return nullptr;
 }
 
 void ChromeContentBrowserClient::RecordURLMetric(const std::string& metric,
                                                  const GURL& url) {
   if (url.is_valid()) {
@@ skipping 163 matching lines @@
   if (channel <= kMaxDisableEncryptionChannel) {
     static const char* const kWebRtcDevSwitchNames[] = {
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)