Revert of Drive: Let DriveUploader use batch request API. (patchset #7 id:120001 of https://codereview.chromium.org/
1134633003/)
Reason for revert:
MigrationSingleClientTest.AllTypesIndividually is broken by this change on Linux GN:
http://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/28327
Original issue's description:
> Drive: Let DriveUploader use batch request API.
>
> The CL lets DriveUploader use batch request API. DriveUploader does asynchronous
> preparation before calling API on service interface. To hold batch request
> during the asynchronous preparation, the CL introduce refcounted hepler class,
> which manages life time of batch request configurator.
>
> BUG=451917
> TEST=DriveUploaderTest
>
> Committed: https://crrev.com/
9cf453b74c8790f6d7a91f958ec998a9fa5a1fa0
> Cr-Commit-Position: refs/heads/master@{#329599}
TBR=kinaba@chromium.org,tzik@chromium.org,hirono@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=451917
Review URL: https://codereview.chromium.org/
1135353004
Cr-Commit-Position: refs/heads/master@{#329610}