[IndexedDB] Adding async tracing for renderer calls.

third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp

Index: third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
index c2847e08d92dc97aa66ea911adc8558eda3f7814..44d12bdb41561262e1273c5d2ba0b99360d0161e 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBFactory.cpp
@@ -65,7 +65,9 @@ static bool IsContextValid(ExecutionContext* context) {
 
 IDBRequest* IDBFactory::getDatabaseNames(ScriptState* script_state,
                                          ExceptionState& exception_state) {
-  IDB_TRACE("IDBFactory::getDatabaseNames");
+  IDB_TRACE("IDBFactory::getDatabaseNamesCall");
+  auto metrics = WTF::MakeUnique<IDBRequest::ScopedMetricsTracker>(
+      nullptr, "IDBFactory::getDatabaseNames", this);
   if (!IsContextValid(ExecutionContext::From(script_state)))
     return nullptr;
   if (!ExecutionContext::From(script_state)
@@ -76,8 +78,8 @@ IDBRequest* IDBFactory::getDatabaseNames(ScriptState* script_state,
     return nullptr;
   }
 
-  IDBRequest* request =
-      IDBRequest::Create(script_state, IDBAny::CreateNull(), nullptr);
+  IDBRequest* request = IDBRequest::Create(script_state, IDBAny::CreateNull(),
+                                           nullptr, std::move(metrics));
 
   if (!IndexedDBClient::From(ExecutionContext::From(script_state))
            ->AllowIndexedDB(ExecutionContext::From(script_state),