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Refer here for details:
https://cs.chromium.org/chromium/src/base/bind_internal.h?rcl=9050148b1dffa4d6e695d0732c368e954e15a4e0&l=787

Change-Id: I6aab905a1fc8d21967a0aff5df6fea3eab7decfc
Reviewed-on: https://chromium-review.googlesource.com/1208726
Commit-Queue: Ganggui Tang <gogerald@chromium.org>
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589180}