GitLab

Drive API v2 can copy a file not only into root directory but also other
directory directly, and it should more efficient and simpler.
This CL uses it to upload JSON GDoc file.

BUG=277353
TEST=Ran unit_tests and tested manually.

Review URL: https://chromiumcodereview.appspot.com/23344004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221697 0039d316-1c4b-4281-b951-d872f2087c98