Fix remoting_unittests that are failing on 32-bit linux

remoting/host/security_key/remote_security_key_ipc_constants.h

Index: remoting/host/security_key/remote_security_key_ipc_constants.h
diff --git a/remoting/host/security_key/remote_security_key_ipc_constants.h b/remoting/host/security_key/remote_security_key_ipc_constants.h
index 4952735070227c2d8e28da20a30fce0d25865f5c..338f198797f254bf62a916d6c1206782e79c1b2b 100644
--- a/remoting/host/security_key/remote_security_key_ipc_constants.h
+++ b/remoting/host/security_key/remote_security_key_ipc_constants.h
@@ -19,6 +19,11 @@ const std::string& GetRemoteSecurityKeyIpcChannelName();
 // Sets the name of the well-known IPC server channel for testing purposes.
 void SetRemoteSecurityKeyIpcChannelNameForTest(const std::string& channel_name);
 
+// Returns a path appropriate for placing a channel name.  Without this path
+// prefix, we may not have permission on linux to bind(2) a socket to a name in
+// the current directly.

[Jamie, 2016/05/20 20:27:34]

s/directly/directory/

[Tom (Use chromium acct), 2016/05/20 21:31:01]

Done.

+std::string GetChannelNamePathPrefixForTest();
+
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_SECURITY_KEY_REMOTE_SECURITY_KEY_IPC_CONSTANTS_H_