mac: Prepare most test code for -Wunused-functions too.

remoting/host/remoting_me2me_host.cc

Index: remoting/host/remoting_me2me_host.cc
diff --git a/remoting/host/remoting_me2me_host.cc b/remoting/host/remoting_me2me_host.cc
index 97886e9e89c997d93f0aff30145f6579cf9f3c6a..a2c1d94266403915dd1412951b92ce431351d8f7 100644
--- a/remoting/host/remoting_me2me_host.cc
+++ b/remoting/host/remoting_me2me_host.cc
@@ -98,8 +98,6 @@
 #include "ui/gfx/gtk_util.h"
 #endif  // defined(TOOLKIT_GTK)
 
-namespace {
-
 // This is used for tagging system event logs.
 const char kApplicationName[] = "chromoting";
 
@@ -117,12 +115,6 @@ const char kSignalParentSwitchName[] = "signal-parent";
 // from stdin.
 const char kStdinConfigPath[] = "-";
 
-void QuitMessageLoop(base::MessageLoop* message_loop) {
-  message_loop->PostTask(FROM_HERE, base::MessageLoop::QuitClosure());
-}
-
-}  // namespace
-
 namespace remoting {
 
 class HostProcess