Rename AsyncCallChainMap.h in core.gypi.
Rename AsyncCallChainMap.h in core.gypi.

AsyncCallChainMap.h was renamed AsyncOperationMap in
https://codereview.chromium.org/858173002 . This does that rename
in the gypi file as well to avoid warnings from the msvs-ninja
gyp generator.

R=aandrey@chromium.org,yurys@chromium.org

BUG=459058,439376

Review URL: https://codereview.chromium.org/943363002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@190826 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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