[Presentation API] (alternative) 1-UA: send message between controller and receiver page

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 9b2ca0d0d4f32b231024ea9e99af548a24f248f5..708555706c9c8df76675fbdc983032e1671b091a 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -333,6 +333,7 @@
 #include "chrome/browser/media/cast_remoting_connector.h"
 #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)
@@ -3058,9 +3059,9 @@ void ChromeContentBrowserClient::OpenURL(
 #endif
 }
 
-content::PresentationServiceDelegate*
-ChromeContentBrowserClient::GetPresentationServiceDelegate(
-      content::WebContents* web_contents) {
+content::ControllerPresentationServiceDelegate*
+ChromeContentBrowserClient::GetControllerPresentationServiceDelegate(
+    content::WebContents* web_contents) {
 #if defined(ENABLE_MEDIA_ROUTER)
   if (media_router::MediaRouterEnabled(web_contents->GetBrowserContext())) {
     return media_router::PresentationServiceDelegateImpl::
@@ -3070,6 +3071,22 @@ ChromeContentBrowserClient::GetPresentationServiceDelegate(
   return nullptr;
 }
 
+content::ReceiverPresentationServiceDelegate*
+ChromeContentBrowserClient::GetReceiverPresentationServiceDelegate(
+    content::WebContents* web_contents) {
+  if (media_router::MediaRouterEnabled(web_contents->GetBrowserContext())) {
+    // ReceiverPresentationServiceDelegateImpl exists only for WebContents
+    // created for offscreen presentations. The WebContents must belong to
+    // an incognito profile.
+    if (auto* impl = media_router::ReceiverPresentationServiceDelegateImpl::
+            FromWebContents(web_contents)) {
+      DCHECK(web_contents->GetBrowserContext()->IsOffTheRecord());
+      return impl;
+    }
+  }
+  return nullptr;
+}
+
 void ChromeContentBrowserClient::RecordURLMetric(const std::string& metric,
                                                  const GURL& url) {
   if (url.is_valid()) {