• brucedawson's avatar
    Enforce strict weak ordering on NaN frequencies · 58ba4cef
    brucedawson authored
    In crrev.com/2856103002 sentinel frequency values were introduced, using
    NaN as the sentinel. However the comparison function was not *fully*
    updated to support these - comparing two NaNs would give ambiguous
    results. This caused test failures when building with VS 2017, probably
    because of subtle changes in the arrangement of nodes in the tree.
    
    This change uses the the node ID to break ties. An alternative would be
    to use a non-NaN sentinel value.
    
    R=bmeurer@chromium.org
    BUG=chromium:722480
    
    Review-Url: https://codereview.chromium.org/2894433004
    Cr-Commit-Position: refs/heads/master@{#45415}
    58ba4cef
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