drive: Fix a crash in gdata::GDataWapiFeedLoader::OnGetChangelist()

Yet another base::Passed(&scoped_ptr) issue. This is essentially identical
to crbug.com/147659 but only occurs with --enable-drive-v2-api

BUG=148750
TEST=crash is gone with an account with many files on drive, with --enable-drive-v2-api

Review URL: https://codereview.chromium.org/10933053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@156365 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed