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After the Drive API supports Team Drive, each Team Drive can be queried
for its changes individually, in addition to the files owned by a user.
This is necessary to fetch change of files under Team Drive, especially
those created by another user.

TEST=google_apis_unittests --gtest_filter=DriveApiRequestsTest.*:DriveApiUrlGeneratorTest.*
BUG=715355

Review-Url: https://codereview.chromium.org/2854653004
Cr-Commit-Position: refs/heads/master@{#468600}