google-api-go-client: Missed review feedback in last CL.
google-api-go-client: Missed review feedback in last CL.

Change-Id: Idc685bb6ae45108f0da2a47a63337674a9eec4ed
Reviewed-on: https://code-review.googlesource.com/1840
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

digideskio/google-api-go-client,webhost/google-api-go-client,google/google-api-go-client,likaiwalkman/google-api-go-client,evandbrown/google-api-go-client,jfcote87/api2,80nashi/google-api-go-client,ropik/google-api-go-client,google/google-api-go-client,stems/google-api-go-client,peterkshultz/google-api-go-client,krsjoseph/google-api-go-client,stephenwithav/google-api-go-client,googleapis/google-api-go-client,odeke-em/google-api-go-client,shibukawa/google-api-go-client,ropik/google-api-go-client,googleapis/google-api-go-client,jfcote87/api2,shibukawa/google-api-go-client,t9nf/google-api-go-client,skyeunknown084/gmail-api