I broke my dining table's glass top this morning. I don't know the manufacturer
of this dining table. I need to find out which place in Mountain
View,CA or around can make a custom made glass top for this table. I
have salvaged some glass pieces for reference and will provide a
design.

You need a glazier that can properly finish the edge of the new glass
top.  Perhaps one can even suggest a type of glass that is less
breakable, but would be more expensive.
It is good that you save a few pieces.  Needless to say, be sure that
your pattern is correct.  Also include the dimensions if you feel that
these are perfectly accurate, e.g., 4 feet wide and 8 ft long with
semicircular ends, or give him a sample of a rounded corner.

Now here is a site with glaziers in the South Bay area:

://www.google.com/local?num=20&hl=en&lr=lang_de&c2coff=1&safe=off&q=glazier&near=Mountain+View,+CA&sa=X&oi=localr

Good luck.