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

content/public/browser/presentation_session.cc

Index: content/public/browser/presentation_session.cc
diff --git a/content/public/browser/presentation_session.cc b/content/public/browser/presentation_session.cc
index ceca42d9f895fd37093852e491022a92650c13af..61dbf3127dc4eac65eb49240ad826e23986d68a2 100644
--- a/content/public/browser/presentation_session.cc
+++ b/content/public/browser/presentation_session.cc
@@ -9,7 +9,15 @@ namespace content {
 PresentationSessionInfo::PresentationSessionInfo(
     const GURL& presentation_url,
     const std::string& presentation_id)
-    : presentation_url(presentation_url), presentation_id(presentation_id) {}
+    : PresentationSessionInfo(presentation_url, presentation_id, false) {}
+
+PresentationSessionInfo::PresentationSessionInfo(
+    const GURL& presentation_url,
+    const std::string& presentation_id,
+    bool is_offscreen)
+    : presentation_url(presentation_url),
+      presentation_id(presentation_id),
+      is_offscreen(is_offscreen) {}
 
 PresentationSessionInfo::~PresentationSessionInfo() {
 }