[net_unittests] Normalize newline characters in tests

[msolianko]

b/219056504

Fixed tests where the expected newline was LF (\n) but some files and data contained CRLF (\r\n). In some cases, the code was modified to replace \r\n with \n for normalization. In other instances, where a string with \n was expected, the expected string was adjusted by removing that character, and the actual output underwent whitespace collapsing (removing \r\n).

[amurovanyi]

LGTM

[TyHolc]

LGTM, just working on getting those 3 failed builds to pass. It looks like they should be unrelated to this change.

[TyHolc]

Looks like there is a single failed test that might be related to this change:

[ RUN      ] All/CertVerifyProcInternalTest.ExtraneousMD5RootCert/CertVerifyProcBuiltin
[/3895:ERROR:cert_verify_proc_builtin.cc(624)] No net_fetcher for performing AIA chasing.
[/3895:ERROR:cert_verify_proc_builtin.cc(624)] No net_fetcher for performing AIA chasing.
[/3895:ERROR:cert_verify_proc_builtin.cc(702)] CertVerifyProcBuiltin for 127.0.0.1 failed:
----- Certificate i=0 (CN=127.0.0.1,O=Test CA,L=Mountain View,ST=California,C=US) -----
ERROR: Time is after notAfter


../../net/cert/cert_verify_proc_unittest.cc:972: Failure
Value of: error
Expected: net::OK
  Actual: -201, net::ERR_CERT_DATE_INVALID
[  FAILED  ] All/CertVerifyProcInternalTest.ExtraneousMD5RootCert/CertVerifyProcBuiltin, where GetParam() = 2 (0 ms)

Not sure if that is just a coincidentally failing test or if some of the extra string trimming broke the expiration date check for the cert in that test.