Revert of Revert some other possible suspects of a 0.43% size increase of setup.exe: https://build.chromium.o…

remoting/signaling/xmpp_signal_strategy_unittest.cc

Index: remoting/signaling/xmpp_signal_strategy_unittest.cc
diff --git a/remoting/signaling/xmpp_signal_strategy_unittest.cc b/remoting/signaling/xmpp_signal_strategy_unittest.cc
index b4c4a5374bcb29c01f37673d9fd1a9b31a974917..219398238b6f1b8ffb555d2e1915552cdd4b0ccb 100644
--- a/remoting/signaling/xmpp_signal_strategy_unittest.cc
+++ b/remoting/signaling/xmpp_signal_strategy_unittest.cc
@@ -28,6 +28,14 @@
   }
 
   void Reset() override {}
+
+  bool AllReadDataConsumed() const override {
+    return true;
+  }
+
+  bool AllWriteDataConsumed() const override {
+    return true;
+  }
 
   void ReceiveData(const std::string& text) {
     socket()->OnReadComplete(