[RDHI] Refactored blocked_loaders_map_ to key by render frame route id

content/browser/loader/global_routing_id.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_LOADER_GLOBAL_ROUTING_ID_H_
 #define CONTENT_BROWSER_LOADER_GLOBAL_ROUTING_ID_H_
 
 #include <tuple>
 
 namespace content {
@@ skipping 20 matching lines @@
   }
   bool operator==(const GlobalRoutingID& other) const {
     return child_id == other.child_id &&
         route_id == other.route_id;
   }
   bool operator!=(const GlobalRoutingID& other) const {
     return !(*this == other);
   }
 };
 
+// Same as GlobalRoutingID except the route_id must be a render frame routing
+// id.
+struct GlobalFrameRoutingId : public GlobalRoutingID {

[nasko, 2016/01/07 00:43:09]

Is it possible to avoid the inheritance? It will allow us to use the compiler to
enforce type safety and as it is, this looks dangerous.

[Charlie Harrison, 2016/01/07 22:47:05]

Yeah it's possible, we just need to copy the boilerplate. Done.

+  GlobalFrameRoutingId(int child_id, int render_frame_route_id)
+      : GlobalRoutingID(child_id, render_frame_route_id) {}
+};
+
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_GLOBAL_ROUTING_ID_H_