Towards moving guest management to chrome: Introduce GuestViewManager

chrome/browser/guestview/webview/webview_guest.h

Index: chrome/browser/guestview/webview/webview_guest.h
diff --git a/chrome/browser/guestview/webview/webview_guest.h b/chrome/browser/guestview/webview/webview_guest.h
index 6b22a0189fa2bdcf1f9260e9c50ec2984690833f..da24c81df1c0ce744749525e177c6fb81d0a31da 100644
--- a/chrome/browser/guestview/webview/webview_guest.h
+++ b/chrome/browser/guestview/webview/webview_guest.h
@@ -36,7 +36,8 @@ class WebViewGuest : public GuestView,
                      public content::WebContentsObserver {
  public:
   WebViewGuest(content::WebContents* guest_web_contents,
-               const std::string& embedder_extension_id);
+               const std::string& embedder_extension_id,
+               const base::WeakPtr<GuestView>& opener);
 
   static WebViewGuest* From(int embedder_process_id, int instance_id);
   static WebViewGuest* FromWebContents(content::WebContents* contents);