Add sound volume to device attribute reporting

chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc

Index: chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
diff --git a/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc b/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
index 6d92f46a9b8ae70289f11ba1fc6116bf25566cd9..e142611e18aeff4e469a2739d978e30aa2c4ed3f 100644
--- a/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
+++ b/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
@@ -491,6 +491,13 @@ void DecodeReportingPolicies(const em::ChromeDeviceSettingsProto& policy,
                     DecodeIntegerValue(container.device_status_frequency()),
                     nullptr);
     }
+    if (container.has_report_sound_volume()) {
+      policies->Set(
+          key::kReportSoundVolume, POLICY_LEVEL_MANDATORY,

[Andrew T Wilson (Slow), 2017/03/09 15:56:34]

I wouldn't build a separate control for this - just include this with
report_hardware_status()

+          POLICY_SCOPE_MACHINE, POLICY_SOURCE_CLOUD,
+          base::MakeUnique<base::Value>(container.report_sound_volume()),
+          nullptr);
+    }
   }
 
   if (policy.has_device_heartbeat_settings()) {