Initial work to move downloads to ContentIds

components/offline_items_collection/core/offline_item.cc

 // Copyright 2017 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/offline_items_collection/core/offline_item.h"
 
 namespace offline_items_collection {
 
 ContentId::ContentId() = default;
 
 ContentId::ContentId(const ContentId& other) = default;
 
 ContentId::ContentId(const std::string& name_space, const std::string& id)
-    : name_space(name_space), id(id) {}
+    : name_space(name_space), id(id) {
+  DCHECK_EQ(std::string::npos, name_space.find_first_of(","));
+}
 
 ContentId::~ContentId() = default;
 
 bool ContentId::operator==(const ContentId& content_id) const {
   return name_space == content_id.name_space && id == content_id.id;
 }
 
 bool ContentId::operator<(const ContentId& content_id) const {
   return std::tie(name_space, id) <
          std::tie(content_id.name_space, content_id.id);
@@ skipping 30 matching lines @@
          original_url == offline_item.original_url &&
          is_off_the_record == offline_item.is_off_the_record &&
          state == offline_item.state &&
          is_resumable == offline_item.is_resumable &&
          received_bytes == offline_item.received_bytes &&
          percent_completed == offline_item.percent_completed &&
          time_remaining_ms == offline_item.time_remaining_ms;
 }
 
 }  // namespace offline_items_collection