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 67db675560d7a2649d7f038d6fcbfae5f55a1ee3..f332ce0eddc5acee028f29adbef70527e994d600 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"
@@ -70,6 +71,7 @@ device::HidService* ChromeExtensionsAPIClient::GetHidService() {
 
 void ChromeExtensionsAPIClient::RegisterGuestViewTypes() {
   ExtensionOptionsGuest::Register();
+  MimeHandlerViewGuest::Register();
 }
 
 }  // namespace extensions