athena: Avoid initializaing chromeos::Network for tests.

athena/test/base/athena_test_helper.cc

Index: athena/test/base/athena_test_helper.cc
diff --git a/athena/test/base/athena_test_helper.cc b/athena/test/base/athena_test_helper.cc
index dd9177e02efae28f895207710caac898a920bad8..42e04d1c55bc54a5a775f81af566cfe8036b2b97 100644
--- a/athena/test/base/athena_test_helper.cc
+++ b/athena/test/base/athena_test_helper.cc
@@ -15,7 +15,6 @@
 #include "base/run_loop.h"
 #include "base/threading/thread.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
-#include "chromeos/network/network_handler.h"
 #include "ui/aura/env.h"
 #include "ui/aura/input_state_lookup.h"
 #include "ui/aura/test/env_test_helper.h"
@@ -52,7 +51,6 @@ void AthenaTestHelper::SetUp(ui::ContextFactory* context_factory) {
   file_thread_->StartWithOptions(options);
 
   chromeos::DBusThreadManager::Initialize();
-  chromeos::NetworkHandler::Initialize();
   ui::InitializeInputMethodForTesting();
   aura::Env::CreateInstance(true);
   aura::Env::GetInstance()->set_context_factory(context_factory);
@@ -81,7 +79,6 @@ void AthenaTestHelper::TearDown() {
 #endif
 
   ui::ShutdownInputMethodForTesting();
-  chromeos::NetworkHandler::Shutdown();
   chromeos::DBusThreadManager::Shutdown();
 }