[Presentation API] 1-UA presentation support + presenter APIs.

chrome/browser/extensions/api/tab_capture/offscreen_presentation.h

Index: chrome/browser/extensions/api/tab_capture/offscreen_presentation.h
diff --git a/chrome/browser/extensions/api/tab_capture/offscreen_presentation.h b/chrome/browser/extensions/api/tab_capture/offscreen_presentation.h
index 03ca5c22810b3cbf2daf8cb9073895912bec0fe8..4eb305820f6634809baf6d874c6b2c7b38c0ee51 100644
--- a/chrome/browser/extensions/api/tab_capture/offscreen_presentation.h
+++ b/chrome/browser/extensions/api/tab_capture/offscreen_presentation.h
@@ -18,6 +18,10 @@
 
 class Profile;
 
+namespace media_router {
+class OneUAPresentationRouter;
+}
+
 namespace extensions {
 
 class OffscreenPresentation;  // Forward declaration.  See below.
@@ -178,6 +182,9 @@ class OffscreenPresentation : protected content::WebContentsDelegate,
   // OffscreenPresentation when the capturer count returns to zero.
   void DieIfContentCaptureEnded();
 
+  // Unregisters this presentation from OneUAPresentationRouter and destroys it.
+  void Close();

[whywhat, 2015/09/14 15:20:39]

nit: the name is very out of sync from the comment - either the comment reveals
implementation details or the name has to be changed to something along the
lines of it

[miu, 2015/09/17 00:09:20]

I think it would be reasonable to name this method Destroy(), which handles
de-registering and deletes |this| before returning.  This is the approach
classes like content::RenderWidgetHostImpl take.  Ex:
https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/re...

[imcheng, 2015/09/26 01:21:56]

Done.

[imcheng, 2015/09/26 01:21:57]

Done.

+
   OffscreenPresentationsOwner* const owner_;
 
   // The starting URL for this presentation, which may or may not match the
@@ -194,6 +201,8 @@ class OffscreenPresentation : protected content::WebContentsDelegate,
   // The WebContents containing the offscreen presentation page.
   scoped_ptr<content::WebContents> presentation_web_contents_;
 
+  media_router::OneUAPresentationRouter* const one_ua_presentation_router_;
+
   // The time at which Start() finished creating |presentation_web_contents_|.
   base::TimeTicks start_time_;