Parse DeviceUsbPowerShare proto in device decoder

Parse DeviceUsbPowerShareProto to DeviceUsbPowerShareEnabled policy in
device policy decoder.

BUG=b:130014793
TEST=manual

Change-Id: Id9c10aa65cd461e21d5abf5ce7ccdeadc58322d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1587603Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Oleh Lamzin <lamzin@google.com>
Cr-Commit-Position: refs/heads/master@{#655009}

chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc

@@ -1330,6 +1330,17 @@ void DecodeGenericPolicies(const em::ChromeDeviceSettingsProto& policy,
           nullptr);
     }
   }
+
+  if (policy.has_device_usb_power_share()) {
+    const em::DeviceUsbPowerShareProto& container(
+        policy.device_usb_power_share());
+    if (container.has_enabled()) {
+      policies->Set(key::kDeviceUsbPowerShareEnabled, POLICY_LEVEL_MANDATORY,
+                    POLICY_SCOPE_MACHINE, POLICY_SOURCE_CLOUD,
+                    std::make_unique<base::Value>(container.enabled()),
+                    nullptr);
+    }
+  }
 }
 
 }  // namespace