refactor 'ExtractHeader' to 'gophercloud' proper
diff --git a/openstack/objectstorage/v1/accounts/results.go b/openstack/objectstorage/v1/accounts/results.go
index b254db9..abae026 100644
--- a/openstack/objectstorage/v1/accounts/results.go
+++ b/openstack/objectstorage/v1/accounts/results.go
@@ -1,23 +1,14 @@
 package accounts
 
 import (
-	"net/http"
 	"strings"
 
 	"github.com/rackspace/gophercloud"
 )
 
-type headerResult struct {
-	gophercloud.Result
-}
-
-func (hr headerResult) ExtractHeader() (http.Header, error) {
-	return hr.Header, hr.Err
-}
-
 // GetResult is returned from a call to the Get function.
 type GetResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // ExtractMetadata is a function that takes a GetResult (of type *http.Response)
@@ -39,5 +30,5 @@
 
 // UpdateResult is returned from a call to the Update function.
 type UpdateResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
diff --git a/openstack/objectstorage/v1/containers/results.go b/openstack/objectstorage/v1/containers/results.go
index e3cddc4..74f3286 100644
--- a/openstack/objectstorage/v1/containers/results.go
+++ b/openstack/objectstorage/v1/containers/results.go
@@ -2,7 +2,6 @@
 
 import (
 	"fmt"
-	"net/http"
 	"strings"
 
 	"github.com/rackspace/gophercloud"
@@ -97,17 +96,9 @@
 	}
 }
 
-type headerResult struct {
-	gophercloud.Result
-}
-
-func (hr headerResult) ExtractHeader() (http.Header, error) {
-	return hr.Header, hr.Err
-}
-
 // GetResult represents the result of a get operation.
 type GetResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // ExtractMetadata is a function that takes a GetResult (of type *http.Response)
@@ -130,19 +121,19 @@
 // the headers from the HTTP response, you can invoke the 'ExtractHeader'
 // method on the result struct.
 type CreateResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // UpdateResult represents the result of an update operation. To extract the
 // the headers from the HTTP response, you can invoke the 'ExtractHeader'
 // method on the result struct.
 type UpdateResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // DeleteResult represents the result of a delete operation. To extract the
 // the headers from the HTTP response, you can invoke the 'ExtractHeader'
 // method on the result struct.
 type DeleteResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
diff --git a/openstack/objectstorage/v1/objects/results.go b/openstack/objectstorage/v1/objects/results.go
index 274d8a6..102d94c 100644
--- a/openstack/objectstorage/v1/objects/results.go
+++ b/openstack/objectstorage/v1/objects/results.go
@@ -4,7 +4,6 @@
 	"fmt"
 	"io"
 	"io/ioutil"
-	"net/http"
 	"strings"
 
 	"github.com/rackspace/gophercloud"
@@ -98,17 +97,9 @@
 	}
 }
 
-type headerResult struct {
-	gophercloud.Result
-}
-
-func (hr headerResult) ExtractHeader() (http.Header, error) {
-	return hr.Header, hr.Err
-}
-
 // DownloadResult is a *http.Response that is returned from a call to the Download function.
 type DownloadResult struct {
-	headerResult
+	gophercloud.HeaderResult
 	Body io.ReadCloser
 }
 
@@ -131,7 +122,7 @@
 
 // GetResult is a *http.Response that is returned from a call to the Get function.
 type GetResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // ExtractMetadata is a function that takes a GetResult (of type *http.Response)
@@ -152,20 +143,20 @@
 
 // CreateResult represents the result of a create operation.
 type CreateResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // UpdateResult represents the result of an update operation.
 type UpdateResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // DeleteResult represents the result of a delete operation.
 type DeleteResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }
 
 // CopyResult represents the result of a copy operation.
 type CopyResult struct {
-	headerResult
+	gophercloud.HeaderResult
 }