Revert of Make __DATE__ and __TIME__ to evaluate to an empty string. (patchset #5 id:80001 of https://codereview.chromium.org/2255093004/ )

Reason for revert:
This introduces a clang crash when pch are used.  See: https://llvm.org/bugs/show_bug.cgi?id=29119

Original issue's description:
> Make __DATE__ and __TIME__ to evaluate to an empty string.
>
> If __DATE__ or __TIME__ used in code, current date or time will be
> filled.  Such a value may change compile by compile, and breaks
> deterministic build.
>
> BUG=314403
>
> Committed: https://crrev.com/43088a9ef885a695061a49bcd0992cbce00a7568
> Cr-Commit-Position: refs/heads/master@{#414018}

TBR=maruel@chromium.org,dpranke@google.com,dpranke@chromium.org,rohitrao@chromium.org,thakis@chromium.org,yyanagisawa@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=314403
NOTRY=TRUE

Review-Url: https://codereview.chromium.org/2277783002
Cr-Commit-Position: refs/heads/master@{#414120}
1 file changed