Merge from Widevine repo of http://go/wvgerrit/53640
While HttpSocket supports both secure and insecure requests, the
error-handling code in HttpSocket::Read() was written assuming that
the insecure code path was previously taken. This resulted in spurious
and misleading error messages being printed when an SSL error
occurred, and it also meant that retryable SSL responses were not
being retried. Also, the code for detecting a closed connection was
technically incorrect, although a quirk of BoringSSL meant that it
happened to work well enough to go unnoticed.
This patch adds separate SSL error handling from the non-secure error
handling. It correctly checks for a closed connection. It will retry
retryable errors after a delay. And it prints the correct BoringSSL
error when an unrecoverable error occurs. There should be no change in
behavior for insecure connections.
Bug: 77338045
Test: CE CDM Unit Tests
Test: tested as part of http://go/ag/4674759
Change-Id: I8c45ca5771f22c11716d2e3649de91ab1acc1954
0936f1b875