Remove using namespace in net/quic/quic_stream_sequencer.h

components/component_updater/test/component_updater_ping_manager_unittest.cc

 // Copyright 2013 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 "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/version.h"
 #include "components/component_updater/component_updater_ping_manager.h"
 #include "components/component_updater/crx_update_item.h"
 #include "components/component_updater/test/test_configurator.h"
 #include "components/component_updater/test/url_request_post_interceptor.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using std::string;
+
 namespace component_updater {
 
 class ComponentUpdaterPingManagerTest : public testing::Test {
  public:
   ComponentUpdaterPingManagerTest();
   ~ComponentUpdaterPingManagerTest() override {}
 
   void RunThreadsUntilIdle();
 
   // Overrides from testing::Test.
@@ skipping 140 matching lines @@
           "errorcode=\"-1\" url=\"http://host1/path1\" downloaded=\"123\" "
           "total=\"456\" download_time_ms=\"987\"/>"
           "<event eventtype=\"14\" eventresult=\"1\" downloader=\"bits\" "
           "url=\"http://host2/path2\" downloaded=\"1230\" total=\"4560\" "
           "download_time_ms=\"9870\"/></app>"))
       << interceptor->GetRequestsAsString();
   interceptor->Reset();
 }
 
 }  // namespace component_updater