Split out QuicAlarm creation from QuicConnectionHelper to new QuicAlarmFactory.

net/tools/quic/quic_simple_server_test.cc

Index: net/tools/quic/quic_simple_server_test.cc
diff --git a/net/tools/quic/quic_simple_server_test.cc b/net/tools/quic/quic_simple_server_test.cc
index 3a7c54ee1f93f646b6762ddd1ef6aaa066f00ab3..550d597b0ffe155f138aabb6481c4b1365228acf 100644
--- a/net/tools/quic/quic_simple_server_test.cc
+++ b/net/tools/quic/quic_simple_server_test.cc
@@ -26,7 +26,8 @@ class QuicChromeServerDispatchPacketTest : public ::testing::Test {
                        CryptoTestUtils::ProofSourceForTesting()),
         dispatcher_(config_,
                     &crypto_config_,
-                    new net::test::MockConnectionHelper) {
+                    new net::test::MockConnectionHelper,
+                    new net::test::MockAlarmFactory) {
     dispatcher_.InitializeWithWriter(nullptr);
   }