Adding MimeHandlerView.

chrome/browser/extensions/api/chrome_extensions_api_client.cc

Index: chrome/browser/extensions/api/chrome_extensions_api_client.cc
diff --git a/chrome/browser/extensions/api/chrome_extensions_api_client.cc b/chrome/browser/extensions/api/chrome_extensions_api_client.cc
index c15c1df7aab1490e6ff4690c7f0c3369f742dc75..f31b07b43afd61bad209537c9a32ca801f286575 100644
--- a/chrome/browser/extensions/api/chrome_extensions_api_client.cc
+++ b/chrome/browser/extensions/api/chrome_extensions_api_client.cc
@@ -8,6 +8,7 @@
 #include "chrome/browser/extensions/api/storage/sync_value_store_cache.h"
 #include "chrome/browser/guest_view/app_view/chrome_app_view_guest_delegate.h"
 #include "chrome/browser/guest_view/extension_options/extension_options_guest.h"
+#include "chrome/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
 #include "chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h"
 #include "chrome/browser/guest_view/web_view/chrome_web_view_permission_helper_delegate.h"
 #include "content/public/browser/browser_context.h"
@@ -91,6 +92,7 @@ device::HidService* ChromeExtensionsAPIClient::GetHidService() {
 
 void ChromeExtensionsAPIClient::RegisterGuestViewTypes() {
   ExtensionOptionsGuest::Register();
+  MimeHandlerViewGuest::Register();
 }
 
 }  // namespace extensions