Domain Reliability: Return http.error for HTTP errors

Since we're already including the HTTP response code as a field in the report,
don't bother including the specific error code in the status as well.

BUG=

Review URL: https://codereview.chromium.org/398173003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283807 0039d316-1c4b-4281-b951-d872f2087c98

components/domain_reliability/util.cc

@@ -7,7 +7,6 @@
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
-#include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "net/base/net_errors.h"
@@ -84,7 +83,7 @@ bool GetDomainReliabilityBeaconStatus(
     std::string* beacon_status_out) {
   if (net_error == net::OK) {
     if (http_response_code >= 400 && http_response_code < 600)
-      *beacon_status_out = base::StringPrintf("http.%d", http_response_code);
+      *beacon_status_out = "http.error";
     else
       *beacon_status_out = "ok";
     return true;