Split out QuicAlarm creation from QuicConnectionHelper to new QuicAlarmFactory.

net/quic/quic_flow_controller_test.cc

Index: net/quic/quic_flow_controller_test.cc
diff --git a/net/quic/quic_flow_controller_test.cc b/net/quic/quic_flow_controller_test.cc
index b189a4082e89a3e7b3b28b6befd7e537826a52af..3f8b13c8fb63586acc584e66008e359a5c7268e3 100644
--- a/net/quic/quic_flow_controller_test.cc
+++ b/net/quic/quic_flow_controller_test.cc
@@ -29,7 +29,7 @@ class QuicFlowControllerTest : public ::testing::Test {
       : stream_id_(1234),
         send_window_(kInitialSessionFlowControlWindowForTest),
         receive_window_(kInitialSessionFlowControlWindowForTest),
-        connection_(&helper_, Perspective::IS_CLIENT) {}
+        connection_(&helper_, &alarm_factory_, Perspective::IS_CLIENT) {}
 
   void Initialize() {
     flow_controller_.reset(
@@ -43,6 +43,7 @@ class QuicFlowControllerTest : public ::testing::Test {
   QuicByteCount receive_window_;
   std::unique_ptr<QuicFlowController> flow_controller_;
   MockConnectionHelper helper_;
+  MockAlarmFactory alarm_factory_;
   MockConnection connection_;
 };