[tracing] Simplify and improve thread-hopping logic of memory-infra

content/browser/tracing/tracing_controller_impl.cc

Index: content/browser/tracing/tracing_controller_impl.cc
diff --git a/content/browser/tracing/tracing_controller_impl.cc b/content/browser/tracing/tracing_controller_impl.cc
index ce9b854c841b0ed415d69702ed862b9d32b7dd83..2ea35c186b5ee6a2a69216a786cb4aacba6a9d62 100644
--- a/content/browser/tracing/tracing_controller_impl.cc
+++ b/content/browser/tracing/tracing_controller_impl.cc
@@ -866,6 +866,10 @@ void TracingControllerImpl::OnBrowserProcessMemoryDumpDone(uint64 dump_guid,
                                                            bool success) {
   DCHECK_GT(pending_memory_dump_ack_count_, 0);
   --pending_memory_dump_ack_count_;
+  if (!success) {
+    ++failed_memory_dump_count_;
+    DLOG(WARNING) << "Global memory dump aborted on the current process";
+  }
   FinalizeGlobalMemoryDumpIfAllProcessesReplied();
 }