Make debug builds WHITESPACE_ONLY and rely on release build for type-checking.
Make debug builds WHITESPACE_ONLY and rely on release build for type-checking.

This CL makes the test and debug builds compile with WHITESPACE_ONLY. This
eases the debugging process as variable names won't get mangled in the
inspector.

R=jackhou@chromium.org

Review URL: https://codereview.appspot.com/41240043

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