Instantiate ScopedTaskEnvironment in net unittests.

net/quic/chromium/quic_end_to_end_unittest.cc

Index: net/quic/chromium/quic_end_to_end_unittest.cc
diff --git a/net/quic/chromium/quic_end_to_end_unittest.cc b/net/quic/chromium/quic_end_to_end_unittest.cc
index b9597426e4da73833588ef28b75cfb0922a9e763..7fb9618cccf1311370f53c5fc109069064272fbf 100644
--- a/net/quic/chromium/quic_end_to_end_unittest.cc
+++ b/net/quic/chromium/quic_end_to_end_unittest.cc
@@ -9,10 +9,8 @@
 
 #include "base/compiler_specific.h"
 #include "base/memory/ptr_util.h"
-#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/test/scoped_task_scheduler.h"
 #include "net/base/elements_upload_data_stream.h"
 #include "net/base/ip_address.h"
 #include "net/base/test_completion_callback.h"
@@ -276,10 +274,6 @@ TEST_P(QuicEndToEndTest, LargeGetWithNoPacketLoss) {
 }
 
 TEST_P(QuicEndToEndTest, TokenBinding) {
-  // Required by ChannelIDService.
-  base::test::ScopedTaskScheduler scoped_task_scheduler(
-      base::MessageLoop::current());
-
   // Enable token binding and re-initialize the TestTransactionFactory.
   params_.enable_token_binding = true;
   transaction_factory_.reset(new TestTransactionFactory(params_));