Set linux distro to CHROMEOS_RELEASE_DESCRIPTION on ChromeOS

chrome/browser/policy/device_status_collector.cc

Index: chrome/browser/policy/device_status_collector.cc
diff --git a/chrome/browser/policy/device_status_collector.cc b/chrome/browser/policy/device_status_collector.cc
index dae455693e7dd241d8c1ecd11d577e122bb46d0f..0cac6ad4e11837f4e709ce4f4973aeeba48ed45a 100644
--- a/chrome/browser/policy/device_status_collector.cc
+++ b/chrome/browser/policy/device_status_collector.cc
@@ -368,12 +368,12 @@ void DeviceStatusCollector::GetStatus(em::DeviceStatusReportRequest* request) {
 }
 
 void DeviceStatusCollector::OnOSVersion(VersionLoader::Handle handle,
-                                        std::string version) {
+                                        const std::string& version) {
   os_version_ = version;
 }
 
 void DeviceStatusCollector::OnOSFirmware(VersionLoader::Handle handle,
-                                         std::string version) {
+                                         const std::string& version) {
   firmware_version_ = version;
 }