Add request throttler to thumbnail fetching for articles on mobile NTP

components/ntp_snippets/ntp_snippets_fetcher.cc

Index: components/ntp_snippets/ntp_snippets_fetcher.cc
diff --git a/components/ntp_snippets/ntp_snippets_fetcher.cc b/components/ntp_snippets/ntp_snippets_fetcher.cc
index d8ca50902d94038d5d08f33d7b35d85b6716b5f6..d161c624738d70921626b6b934cd1cae3ee43846 100644
--- a/components/ntp_snippets/ntp_snippets_fetcher.cc
+++ b/components/ntp_snippets/ntp_snippets_fetcher.cc
@@ -212,8 +212,8 @@ void NTPSnippetsFetcher::FetchSnippetsFromHosts(
     const std::set<std::string>& hosts,
     const std::string& language_code,
     int count,
-    bool force_request) {
-  if (!request_throttler_.DemandQuotaForRequest(force_request))
+    bool interactive_request) {
+  if (!request_throttler_.DemandQuotaForRequest(interactive_request))
     return;
 
   hosts_ = hosts;