error can shift more than 32 bits.
error can shift more than 32 bits.

From upstream fix:
https://github.com/google/double-conversion/commit/0d25506a2e7fb52928963313343e0237e890059e

BUG=
R=floitsch@google.com

Review URL: https://codereview.chromium.org//1239493002 .

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