Use auth/drive scope, instead of auth/drive.file scope

Use auth/drive scope, instead of auth/drive.file scope

For full access to Drive, we need less restrictive scope.
https://www.googleapis.com/auth/drive.file only allows accessing files
which is created on its own (i.e. Chrome), which is useless for
file browser purpose. Instead, we have to use
https://www.googleapis.com/auth/drive scope.

BUG=chromium:127728
TEST=none

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=150518

[kochi, 2012-08-08 08:31:27]

Kazuhiro,

Could you review this?

[kinaba, 2012-08-08 08:34:03]

lgtm