Revert of Deletes mojo::Callback

extensions/browser/api/mime_handler_private/mime_handler_private.cc

Index: extensions/browser/api/mime_handler_private/mime_handler_private.cc
diff --git a/extensions/browser/api/mime_handler_private/mime_handler_private.cc b/extensions/browser/api/mime_handler_private/mime_handler_private.cc
index 229ea83b6c0844c23f077978aa3431744df7cd2f..120363c8c47160f5b59ae24dea269dc09770704c 100644
--- a/extensions/browser/api/mime_handler_private/mime_handler_private.cc
+++ b/extensions/browser/api/mime_handler_private/mime_handler_private.cc
@@ -65,7 +65,7 @@
 }
 
 void MimeHandlerServiceImpl::GetStreamInfo(
-    const GetStreamInfoCallback& callback) {
+    const mojo::Callback<void(mime_handler::StreamInfoPtr)>& callback) {
   if (!stream_) {
     callback.Run(mime_handler::StreamInfoPtr());
     return;
@@ -73,7 +73,8 @@
   callback.Run(mojo::ConvertTo<mime_handler::StreamInfoPtr>(*stream_));
 }
 
-void MimeHandlerServiceImpl::AbortStream(const AbortStreamCallback& callback) {
+void MimeHandlerServiceImpl::AbortStream(
+    const mojo::Callback<void()>& callback) {
   if (!stream_) {
     callback.Run();
     return;
@@ -83,7 +84,7 @@
 }
 
 void MimeHandlerServiceImpl::OnStreamClosed(
-    const AbortStreamCallback& callback) {
+    const mojo::Callback<void()>& callback) {
   callback.Run();
 }