Moved guest_view_registry to GuestViewManager and made it an instance map

extensions/browser/guest_view/guest_view_base.h

Index: extensions/browser/guest_view/guest_view_base.h
diff --git a/extensions/browser/guest_view/guest_view_base.h b/extensions/browser/guest_view/guest_view_base.h
index 287796360b938c4b7c882d82913879849e917e8b..e34288966989fc592e1a9c281ffa0e69ad38d969 100644
--- a/extensions/browser/guest_view/guest_view_base.h
+++ b/extensions/browser/guest_view/guest_view_base.h
@@ -60,14 +60,6 @@ class GuestViewBase : public content::BrowserPluginGuestDelegate,
     return nullptr;
   }
 
-  using GuestCreationCallback =
-      base::Callback<GuestViewBase*(content::WebContents*)>;
-  static void RegisterGuestViewType(const std::string& view_type,
-                                    const GuestCreationCallback& callback);
-
-  static GuestViewBase* Create(content::WebContents* owner_web_contents,
-                               const std::string& view_type);
-
   static GuestViewBase* FromWebContents(
       const content::WebContents* web_contents);
 
@@ -379,8 +371,6 @@ class GuestViewBase : public content::BrowserPluginGuestDelegate,
   void StartTrackingEmbedderZoomLevel();
   void StopTrackingEmbedderZoomLevel();
 
-  static void RegisterGuestViewTypes();
-
   // This guest tracks the lifetime of the WebContents specified by
   // |owner_web_contents_|. If |owner_web_contents_| is destroyed then this
   // guest will also self-destruct.