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wtc authored
Fix the DCHECK in ValidateLayout for symmetric channel layouts. Add 'const' to methods that don't mutate class members. Include "base/macros.h" for the DISALLOW_COPY_AND_ASSIGN macro. R=dalecurtis@chromium.org Review URL: https://codereview.chromium.org/645853011 Cr-Commit-Position: refs/heads/master@{#300612}
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