Bug 518881: Fix unused-result warnings in IPDL/C++ unit tests.

ipc/ipdl/test/cxx/TestLatency.cpp

@@ -47,7 +47,8 @@ void
 TestLatencyParent::PingPongTrial()
 {
     mStart = TimeStamp::Now();
-    SendPing();
+    if (!SendPing())
+        fail("sending Ping()");
 }
 
 void
@@ -57,11 +58,12 @@ TestLatencyParent::Ping5Pong5Trial()
     // HACK
     mPongsToGo = 5;
 
-    SendPing5();
-    SendPing5();
-    SendPing5();
-    SendPing5();
-    SendPing5();
+    if (!SendPing5() ||
+        !SendPing5() ||
+        !SendPing5() ||
+        !SendPing5() ||
+        !SendPing5())
+        fail("sending Ping5()");
 }
 
 void

ipc/ipdl/test/cxx/TestRPCRaces.cpp

@@ -28,7 +28,8 @@ MediateRace(const RPCChannel::Message& parent,
 void
 TestRPCRacesParent::Main()
 {
-    SendStart();
+    if (!SendStart())
+        fail("sending Start()");
 }
 
 bool

ipc/ipdl/test/cxx/TestRacyRPCReplies.cpp

@@ -56,7 +56,8 @@ TestRacyRPCRepliesParent::Answer_R(int* replyNum)
     *replyNum = ++mReplyNum;
 
     if (1 == *replyNum)
-        Send_A();
+        if (!Send_A())
+            fail("sending _A()");
 
     return true;
 }

ipc/ipdl/test/cxx/TestShutdown.cpp

@@ -8,7 +8,8 @@ namespace _ipdltest {
 void
 TestShutdownParent::Main()
 {
-    SendStart();
+    if (!SendStart())
+        fail("sending Start()");
 }
 
 void