Remove raw base::DictionaryValue::Set in //extensions

extensions/browser/guest_view/web_view/web_view_permission_helper.cc

Index: extensions/browser/guest_view/web_view/web_view_permission_helper.cc
diff --git a/extensions/browser/guest_view/web_view/web_view_permission_helper.cc b/extensions/browser/guest_view/web_view/web_view_permission_helper.cc
index dd76f458de35b76f0fe00e7b4abc3e254729e90e..c97c823cc69bf75e8fde0a216c80b6eaa9b059a5 100644
--- a/extensions/browser/guest_view/web_view/web_view_permission_helper.cc
+++ b/extensions/browser/guest_view/web_view/web_view_permission_helper.cc
@@ -11,6 +11,7 @@
 #include "base/metrics/user_metrics.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
+#include "base/values.h"
 #include "components/guest_view/browser/guest_view_event.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
@@ -330,7 +331,7 @@ int WebViewPermissionHelper::RequestPermission(
   pending_permission_requests_[request_id] =
       PermissionResponseInfo(callback, permission_type, allowed_by_default);
   std::unique_ptr<base::DictionaryValue> args(new base::DictionaryValue());
-  args->Set(webview::kRequestInfo, request_info.DeepCopy());
+  args->Set(webview::kRequestInfo, base::MakeUnique<base::Value>(request_info));
   args->SetInteger(webview::kRequestId, request_id);
   switch (permission_type) {
     case WEB_VIEW_PERMISSION_TYPE_NEW_WINDOW: {