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

chrome/browser/extensions/api/tab_capture/offscreen_tab.cc

Index: chrome/browser/extensions/api/tab_capture/offscreen_tab.cc
diff --git a/chrome/browser/extensions/api/tab_capture/offscreen_tab.cc b/chrome/browser/extensions/api/tab_capture/offscreen_tab.cc
index f50fdf9c3cb89cd7087e96e447cd697affb933df..48d19f672433e30757733471480b9d3766cd3c92 100644
--- a/chrome/browser/extensions/api/tab_capture/offscreen_tab.cc
+++ b/chrome/browser/extensions/api/tab_capture/offscreen_tab.cc
@@ -5,11 +5,14 @@
 #include "chrome/browser/extensions/api/tab_capture/offscreen_tab.h"
 
 #include <algorithm>
+#include <memory>
+#include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/extensions/api/tab_capture/tab_capture_registry.h"
+#include "chrome/browser/media/router/receiver_presentation_service_delegate_impl.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/web_contents_sizer.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ -98,8 +101,9 @@ void OffscreenTab::Start(const GURL& start_url,
   DCHECK(start_time_.is_null());
   start_url_ = start_url;
   DVLOG(1) << "Starting OffscreenTab with initial size of "
-           << initial_size.ToString() << " for start_url=" << start_url_.spec();
-
+           << initial_size.ToString() << " for start_url=" << start_url_.spec()
+           << " Register with ReceiverPresentationServiceDelegateImpl, id="

[mark a. foltz, 2016/10/06 03:13:54]

Should this go down at L125?

[zhaobin, 2016/10/07 01:07:03]

Done.

+           << optional_presentation_id;
   // Create the WebContents to contain the off-screen tab's page.
   offscreen_tab_web_contents_.reset(
       WebContents::Create(WebContents::CreateParams(profile_.get())));
@@ -116,10 +120,11 @@ void OffscreenTab::Start(const GURL& start_url,
   offscreen_tab_web_contents_->SetAudioMuted(true);
 
   // TODO(imcheng): If |optional_presentation_id| is not empty, register it with
-  // the PresentationRouter.  http://crbug.com/513859
+  // the ReceiverPresentationServiceDelegateImpl.  http://crbug.com/513859

[mark a. foltz, 2016/10/06 03:13:54]

It looks like you can delete this TODO :)

[zhaobin, 2016/10/07 01:07:03]

Done.

   if (!optional_presentation_id.empty()) {
-    NOTIMPLEMENTED()
-        << "Register with PresentationRouter, id=" << optional_presentation_id;
+    // Register the offscreen tab as the receiver of the offscreen presentation.
+    media_router::ReceiverPresentationServiceDelegateImpl::CreateForWebContents(
+        offscreen_tab_web_contents_.get(), optional_presentation_id);
   }
 
   // Navigate to the initial URL.