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Feature added to ChromeDriver for a user to be able to  use pipes to
communicate with Chrome. This cl focuses and the handling, reading
from pipe and writing into pipe.

Bug: chromedriver:3480
Change-Id: If7affbb2dd1da96b7484352abbde0a3cf0a92f7d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2333818
Commit-Queue: Lucía Cantú-Miller <cantumiller@google.com>
Reviewed-by: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799811}