service_manager: More consistent Service lifecycle API

services/image_decoder/image_decoder_service.cc

Index: services/image_decoder/image_decoder_service.cc
diff --git a/services/image_decoder/image_decoder_service.cc b/services/image_decoder/image_decoder_service.cc
index 4226e9fe33d1c9f1aa3bd03ee2e899315e1144bd..4ad2a0b0f5af1df89761391f340fdec3cf29a859 100644
--- a/services/image_decoder/image_decoder_service.cc
+++ b/services/image_decoder/image_decoder_service.cc
@@ -62,10 +62,6 @@ bool ImageDecoderService::OnConnect(
   return true;
 }
 
-bool ImageDecoderService::OnStop() {
-  return true;
-}
-
 void ImageDecoderService::MaybeRequestQuitDelayed() {
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE,