Add a button to copy all policies value as JSON in the chrome://policy
page.

Bug: 1020213
Change-Id: I0495e29f834c70bad736f44fb692fb2a14f4c035
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2218767
Commit-Queue: Jerome Gingras <[email protected]>
Reviewed-by: Rohit Rao <[email protected]>
Reviewed-by: Julian Pastarmov <[email protected]>
Cr-Commit-Position: refs/heads/master@{#772807}
diff --git a/chrome/browser/ui/webui/policy_ui.cc b/chrome/browser/ui/webui/policy_ui.cc
index b21cfc6..13d0997 100644
--- a/chrome/browser/ui/webui/policy_ui.cc
+++ b/chrome/browser/ui/webui/policy_ui.cc
@@ -25,6 +25,7 @@
 
   static constexpr webui::LocalizedString kStrings[] = {
     // Localized strings (alphabetical order).
+    {"copyPoliciesJSON", IDS_COPY_POLICIES_JSON},
     {"exportPoliciesJSON", IDS_EXPORT_POLICIES_JSON},
     {"filterPlaceholder", IDS_POLICY_FILTER_PLACEHOLDER},
     {"hideExpandedStatus", IDS_POLICY_HIDE_EXPANDED_STATUS},