[NTP Snippets] Add a flag to not restrict snippets by ML suggestions

components/ntp_snippets/ntp_snippets_service.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/ntp_snippets/ntp_snippets_service.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/json/json_reader.h"
@@ skipping 236 matching lines @@
                                            << snippets_json;
 }
 
 void NTPSnippetsService::OnJsonError(const std::string& snippets_json,
                                      const std::string& error) {
   LOG(WARNING) << "Received invalid JSON (" << error << "): " << snippets_json;
 }
 
 void NTPSnippetsService::FetchSnippetsImpl(
     const std::vector<std::string>& hosts) {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDontRestrict)) {
+    snippets_fetcher_->FetchSnippets(std::vector<std::string>());
+    return;
+  }
   if (!hosts.empty())
     snippets_fetcher_->FetchSnippets(hosts);
 }
 
 bool NTPSnippetsService::LoadFromValue(const base::Value& value) {
   const base::DictionaryValue* top_dict = nullptr;
   if (!value.GetAsDictionary(&top_dict))
     return false;
 
   const base::ListValue* list = nullptr;
@@ skipping 107 matching lines @@
     if (snippet->expiry_date() < next_expiry)
       next_expiry = snippet->expiry_date();
   }
   DCHECK_GT(next_expiry, expiry);
   expiry_timer_.Start(FROM_HERE, next_expiry - expiry,
                       base::Bind(&NTPSnippetsService::RemoveExpiredSnippets,
                                  base::Unretained(this)));
 }
 
 }  // namespace ntp_snippets