libchromeos: Switch http Response to use streams

Make the response data of an HTTP request to use stream interface.

BUG=None
TEST=`FEATURES=test emerge-link libchromeos`

Change-Id: I4d0e427e90f154a83ffd75973b4c211a989c1993
Reviewed-on: https://chromium-review.googlesource.com/265068
Trybot-Ready: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>

buffet/device_registration_info.cc

diff --git a/buffet/device_registration_info.cc b/buffet/device_registration_info.cc
index c9da52b..9cf3579 100644
--- a/buffet/device_registration_info.cc
+++ b/buffet/device_registration_info.cc
@@ -268,8 +268,8 @@
 }
 
 std::unique_ptr<base::DictionaryValue>
-DeviceRegistrationInfo::ParseOAuthResponse(
-    const chromeos::http::Response* response, chromeos::ErrorPtr* error) {
+DeviceRegistrationInfo::ParseOAuthResponse(chromeos::http::Response* response,
+                                           chromeos::ErrorPtr* error) {
   int code = 0;
   auto resp = chromeos::http::ParseJsonResponse(response, &code, error);
   if (resp && code >= chromeos::http::status_code::BadRequest) {

buffet/device_registration_info.h

diff --git a/buffet/device_registration_info.h b/buffet/device_registration_info.h
index 389042b..1f4c05e 100644
--- a/buffet/device_registration_info.h
+++ b/buffet/device_registration_info.h
@@ -162,7 +162,7 @@
   // Parse the OAuth response, and sets registration status to
   // kInvalidCredentials if our registration is no longer valid.
   std::unique_ptr<base::DictionaryValue> ParseOAuthResponse(
-      const chromeos::http::Response* response, chromeos::ErrorPtr* error);
+      chromeos::http::Response* response, chromeos::ErrorPtr* error);
 
   // This attempts to open the XMPP channel. The XMPP channel needs to be
   // restarted anytime the access_token is refreshed.