[Telemetry] Fix profile generator to not include pseudo files.
[Telemetry] Fix profile generator to not include pseudo files.

On mac, the profile may contain a socket, "App Shim Socket". The bots don't like
this because it cannot be copied. I don't think it makes sense for the profile
generator to include these special types of files in the profile.

BUG=308676

Review URL: https://codereview.chromium.org/28073003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@229400 0039d316-1c4b-4281-b951-d872f2087c98

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