[tracing] Add names to memory-infra dumpers for debugging

sql/connection.cc

Index: sql/connection.cc
diff --git a/sql/connection.cc b/sql/connection.cc
index 28beafc54335d7d1d7fc307ca658f1e7bc8333ae..a904632eb517e066596855ab980fe3ce8a80aff3 100644
--- a/sql/connection.cc
+++ b/sql/connection.cc
@@ -355,7 +355,7 @@ Connection::Connection()
       query_time_histogram_(NULL),
       clock_(new TimeSource()) {
   base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
-      this);
+      this, "sql::Connection", nullptr);
 }
 
 Connection::~Connection() {