Force MimeHandlerView to always use BrowserPlugin

content/public/browser/browser_plugin_guest_delegate.h

Index: content/public/browser/browser_plugin_guest_delegate.h
diff --git a/content/public/browser/browser_plugin_guest_delegate.h b/content/public/browser/browser_plugin_guest_delegate.h
index 4dd1a4cd732925d2cb2f18a6f4e31aa032101b5b..a443e1830a7e5a021d09dd7474e4a5c9fc5e19aa 100644
--- a/content/public/browser/browser_plugin_guest_delegate.h
+++ b/content/public/browser/browser_plugin_guest_delegate.h
@@ -92,6 +92,12 @@ class CONTENT_EXPORT BrowserPluginGuestDelegate {
   // fromt he guest renderer is incorrect in situations where BrowserPlugin is
   // subject to CSS transforms.
   virtual void SetContextMenuPosition(const gfx::Point& position) {}
+
+  // TODO(ekaramad): A short workaround for MimeHandlerView to always use a
+  // BrowserPlugin even when guests are based on OOPIF. This is should be
+  // removed after MimeHandlerView is implemented based on OOPIF.
+  // (https://crbug.com/563285).
+  virtual bool IsMimeHandlerViewGuest();
 };
 
 }  // namespace content