Make ScopedURLFetcherFactory sequenced-safe.

net/url_request/test_url_fetcher_factory.cc

Index: net/url_request/test_url_fetcher_factory.cc
diff --git a/net/url_request/test_url_fetcher_factory.cc b/net/url_request/test_url_fetcher_factory.cc
index 424ff93e01361e6666d750c3990c627632c6f28e..e714a200d76d889a9e2489835769a53bdf408217 100644
--- a/net/url_request/test_url_fetcher_factory.cc
+++ b/net/url_request/test_url_fetcher_factory.cc
@@ -13,9 +13,9 @@
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
-#include "base/single_thread_task_runner.h"
+#include "base/sequenced_task_runner.h"
+#include "base/threading/sequenced_task_runner_handle.h"
 #include "base/threading/thread_restrictions.h"
-#include "base/threading/thread_task_runner_handle.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
@@ -389,7 +389,7 @@ FakeURLFetcher::~FakeURLFetcher() {}
 
 void FakeURLFetcher::Start() {
   TestURLFetcher::Start();
-  base::ThreadTaskRunnerHandle::Get()->PostTask(
+  base::SequencedTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&FakeURLFetcher::RunDelegate, weak_factory_.GetWeakPtr()));
 }