[IndexedDB] Adding traces, perf tests

content/browser/indexed_db/indexed_db_database.cc

Index: content/browser/indexed_db/indexed_db_database.cc
diff --git a/content/browser/indexed_db/indexed_db_database.cc b/content/browser/indexed_db/indexed_db_database.cc
index 4b50a9e32905eb93185ada1fbac965ed52d504f2..3bdbf5fb4eaa46fc4daf3ff165aa02128a9c2e8e 100644
--- a/content/browser/indexed_db/indexed_db_database.cc
+++ b/content/browser/indexed_db/indexed_db_database.cc
@@ -1058,19 +1058,22 @@ void IndexedDBDatabase::PutOperation(scoped_ptr<PutOperationParams> params,
                                              error);
     return;
   }
-
-  for (size_t i = 0; i < index_writers.size(); ++i) {
-    IndexWriter* index_writer = index_writers[i];
-    index_writer->WriteIndexKeys(record_identifier,
-                                 backing_store_.get(),
-                                 transaction->BackingStoreTransaction(),
-                                 id(),
-                                 params->object_store_id);
+  {
+    IDB_TRACE1("IndexedDBDatabase::PutOperation::UpdateIndexes", "txn.id",
+               transaction->id());
+    for (size_t i = 0; i < index_writers.size(); ++i) {
+      IndexWriter* index_writer = index_writers[i];
+      index_writer->WriteIndexKeys(record_identifier, backing_store_.get(),
+                                   transaction->BackingStoreTransaction(), id(),
+                                   params->object_store_id);
+    }
   }
 
   if (object_store.auto_increment &&
       params->put_mode != blink::WebIDBPutModeCursorUpdate &&
       key->type() == WebIDBKeyTypeNumber) {
+    IDB_TRACE1("IndexedDBDatabase::PutOperation::AutoIncrement", "txn.id",
+               transaction->id());
     leveldb::Status s = UpdateKeyGenerator(backing_store_.get(),
                                            transaction,
                                            id(),
@@ -1087,8 +1090,11 @@ void IndexedDBDatabase::PutOperation(scoped_ptr<PutOperationParams> params,
       return;
     }
   }
-
-  params->callbacks->OnSuccess(*key);
+  {
+    IDB_TRACE1("IndexedDBDatabase::PutOperation::Callbacks", "txn.id",
+               transaction->id());
+    params->callbacks->OnSuccess(*key);
+  }
 }
 
 void IndexedDBDatabase::SetIndexKeys(int64 transaction_id,
@@ -1547,6 +1553,7 @@ void IndexedDBDatabase::VersionChangeOperation(
 
 void IndexedDBDatabase::TransactionFinished(IndexedDBTransaction* transaction,
                                             bool committed) {
+  IDB_TRACE1("IndexedDBTransaction::TransactionFinished", "txn.id", id());
   DCHECK(transactions_.find(transaction->id()) != transactions_.end());
   DCHECK_EQ(transactions_[transaction->id()], transaction);
   transactions_.erase(transaction->id());