Return the error reason to the caller of SetTargetChannel.
This patch sends back to the caller an error message indicating why the
channel change didn't work.
Bug: 25595865
Test: Deployed on a device and attempted to change to "foo" channel. Error message lists available channels.
Test: FEATURES=test emerge-link update_engine
Change-Id: Idcc67d5c7878ce7af60652d7bf5bf81135325f97
diff --git a/omaha_response_handler_action_unittest.cc b/omaha_response_handler_action_unittest.cc
index 5e62f45..eb6a5af 100644
--- a/omaha_response_handler_action_unittest.cc
+++ b/omaha_response_handler_action_unittest.cc
@@ -387,7 +387,7 @@
params.set_root(test_dir);
params.Init("5.6.7.8", "", 0);
EXPECT_EQ("stable-channel", params.current_channel());
- params.SetTargetChannel("canary-channel", false);
+ params.SetTargetChannel("canary-channel", false, nullptr);
EXPECT_EQ("canary-channel", params.target_channel());
EXPECT_FALSE(params.to_more_stable_channel());
EXPECT_FALSE(params.is_powerwash_allowed());