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

content/public/browser/presentation_session.h

Index: content/public/browser/presentation_session.h
diff --git a/content/public/browser/presentation_session.h b/content/public/browser/presentation_session.h
index 8e5eb54676d349921ea4872aa2c93fd359a0a9dd..526c51a0c0050259362dd8f177ab67b34750b10a 100644
--- a/content/public/browser/presentation_session.h
+++ b/content/public/browser/presentation_session.h
@@ -33,10 +33,14 @@ enum PresentationConnectionCloseReason {
 struct CONTENT_EXPORT PresentationSessionInfo {
   PresentationSessionInfo(const GURL& presentation_url,
                           const std::string& presentation_id);
+  PresentationSessionInfo(const GURL& presentation_url,

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

I would prefer to update the existing constructor, versus adding a new
constructor in this case.  This way the caller has to be explicit about creating
a 1-UA or 2-UA presentation. 

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

Done.

+                          const std::string& presentation_id,
+                          bool is_offscreen_presentation);
   ~PresentationSessionInfo();
 
   const GURL presentation_url;
   const std::string presentation_id;
+  const bool is_offscreen;
 };
 
 // Possible reasons why an attempt to create a presentation session failed.