Refactor how we report reload results

runtime/vm/service.cc

Index: runtime/vm/service.cc
diff --git a/runtime/vm/service.cc b/runtime/vm/service.cc
index 8ef6e8945abac5c1c7ade1623371734315fd2a2c..c57890a6b0404b44a1e447cfeb2be8747eee10b6 100644
--- a/runtime/vm/service.cc
+++ b/runtime/vm/service.cc
@@ -2493,18 +2493,8 @@ static bool ReloadSources(Thread* thread, JSONStream* js) {
   const bool force_reload =
       BoolParameter::Parse(js->LookupParam("force"), false);
 
-  isolate->ReloadSources(force_reload);
+  isolate->ReloadSources(js, force_reload);
 
-  const Error& error = Error::Handle(isolate->sticky_reload_error());
-
-  if (error.IsNull()) {
-    PrintSuccess(js);
-  } else {
-    // Clear the sticky error.
-    isolate->clear_sticky_reload_error();
-    js->PrintError(kIsolateReloadFailed,
-                   "Isolate reload failed: %s", error.ToErrorCString());
-  }
   return true;
 }