Update system log uploader to use new Policy conversions.

Include user policies depends on the parameters.
Include device information.

Use default value of no convert value, convert policy type and enable
pretty print.

Bug: 983174
Change-Id: I3882d0f7f5cc0497e9b897c29d0263e7194d09e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1721377Reviewed-by: Pavol Marko <pmarko@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682319}

chrome/browser/chromeos/policy/system_log_uploader.cc

@@ -173,9 +173,12 @@ std::string SystemLogDelegate::GetPolicyAsJSON() {
           user_manager::UserManager::Get()->GetPrimaryUser()->IsAffiliated();
     }
   }
-  return policy::GetAllPolicyValuesAsJSON(
-      ProfileManager::GetActiveUserProfile(), include_user_policies,
-      true /* with_device_data */, true /* is_pretty_print */);
+  return policy::DictionaryPolicyConversions()
+      .WithBrowserContext(ProfileManager::GetActiveUserProfile())
+      .EnableUserPolicies(include_user_policies)
+      .EnableDevicePolicies(true)
+      .EnableDeviceInfo(true)
+      .ToJSON();
 }
 
 void SystemLogDelegate::LoadSystemLogs(LogUploadCallback upload_callback) {