I understand that there is no NaCl SDK support for ARM platform so far. I am right now developing applications for ARM on Ubuntu. Is there a way I can test the applications on ARM machines without using SDK?. As far as I understand from Native Client website, we need SDK to start the server to test the applications. Does any one have experience on this?
You can develop your application on an x86 machine, and use the SDK's compilers to target NaCl ARM. This is commonly called cross-compiling. You then copy files over to the ARM machine that you want to test with, or use QEMU (to emulate ARM's ISA on an x86 machine).
It's possible to build a NaCl SDK from source for ARM, it's simply not distributed by the SDK team because there hasn't been demand for this.
You're trying to test in a browser? The server is there to serve content to a browser, but I've often found it simpler to use python -m SimpleHTTPServer.