Add trace to the caller of QuotaManager::GetAvailableSpace

content/browser/indexed_db/indexed_db_context_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
+#include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/indexed_db/indexed_db_connection.h"
 #include "content/browser/indexed_db/indexed_db_database.h"
 #include "content/browser/indexed_db/indexed_db_dispatcher_host.h"
 #include "content/browser/indexed_db/indexed_db_factory_impl.h"
 #include "content/browser/indexed_db/indexed_db_quota_client.h"
 #include "content/browser/indexed_db/indexed_db_tracing.h"
 #include "content/browser/indexed_db/indexed_db_transaction.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 559 matching lines @@
           BrowserThread::IO,
           FROM_HERE,
           base::Bind(
               &IndexedDBContextImpl::QueryAvailableQuota, this, origin_url));
     }
     return;
   }
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (!quota_manager_proxy() || !quota_manager_proxy()->quota_manager())
     return;
+
+  // crbug.com/349708
+  TRACE_EVENT0("io", "IndexedDBContextImpl::QueryAvailableQuota");
+
   quota_manager_proxy()->quota_manager()->GetUsageAndQuota(
       origin_url,
       storage::kStorageTypeTemporary,
       base::Bind(&IndexedDBContextImpl::GotUsageAndQuota, this, origin_url));
 }
 
 std::set<GURL>* IndexedDBContextImpl::GetOriginSet() {
   if (!origin_set_) {
     std::vector<GURL> origins;
     GetAllOriginsAndPaths(data_path_, &origins, NULL);
     origin_set_.reset(new std::set<GURL>(origins.begin(), origins.end()));
   }
   return origin_set_.get();
 }
 
 void IndexedDBContextImpl::ResetCaches() {
   origin_set_.reset();
   origin_size_map_.clear();
   space_available_map_.clear();
 }
 
 base::SequencedTaskRunner* IndexedDBContextImpl::TaskRunner() const {
   return task_runner_.get();
 }
 
 }  // namespace content