googleapi: don't close res.Body in CheckMediaResponse
googleapi: don't close res.Body in CheckMediaResponse

The caller is responsible for closing the body (which is reasonable,
since a common pattern is to defer close as soon a request is
successfully made).

Fixes #163.

Change-Id: Icaa3a34ccb4b2c4715d80a23c58c0b1e21d0bfa6
Reviewed-on: https://code-review.googlesource.com/7172
Reviewed-by: Michael McGreevy <e70fec140fa6773c6cfd45cb9b436bd6334f4c24@golang.org>
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@google.com>

googleapis/google-api-go-client,google/google-api-go-client,google/google-api-go-client,googleapis/google-api-go-client