Added policy to disable/enable a system log upload.

chrome/browser/chromeos/policy/proto/chrome_device_policy.proto

Index: chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
diff --git a/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto b/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
index 8ae39d8a085be920257fb0fc0609a0bb6f759157..bcd597e0f2073141f728f5b87e9a03e23f68c82c 100644
--- a/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
+++ b/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
@@ -625,6 +625,12 @@ message LoginScreenDomainAutoCompleteProto {
   optional string login_screen_domain_auto_complete = 1;
 }
 
+// Settings that control whether a device would send system logs to the server.
+message DeviceLogUploadSettingsProto {
+  // Whether the device should send system logs. The default is false.
+  optional bool log_upload_enabled = 1 [default = false];
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
@@ -667,4 +673,5 @@ message ChromeDeviceSettingsProto {
   optional ExtensionCacheSizeProto extension_cache_size = 36;
   optional LoginScreenDomainAutoCompleteProto
       login_screen_domain_auto_complete = 37;
+  optional DeviceLogUploadSettingsProto device_log_upload_settings = 38;
 }