SPDY - persist 300 most recently used servers that support SPDY to preferences file

content/browser/loader/resource_scheduler.cc

 // 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.
 
 #include <set>
 
 #include "content/browser/loader/resource_scheduler.h"
 
 #include "base/stl_util.h"
 #include "content/common/resource_messages.h"
@@ skipping 319 matching lines @@
 
   void ClearInFlightRequests() {
     in_flight_requests_.clear();
     total_delayable_count_ = 0;
   }
 
   bool IsDelayableRequest(ScheduledResourceRequest* request) {
     if (request->url_request()->priority() < net::LOW) {
       net::HostPortPair host_port_pair =
           net::HostPortPair::FromURL(request->url_request()->url());
-      const net::HttpServerProperties& http_server_properties =
+      net::HttpServerProperties& http_server_properties =
           *request->url_request()->context()->http_server_properties();
       if (!http_server_properties.SupportsSpdy(host_port_pair)) {
         return true;
       }
     }
     return false;
   }
 
   void SetRequestDelayable(ScheduledResourceRequest* request,
                            bool delayable) {
@@ skipping 52 matching lines @@
     // TODO(simonjam): This may end up causing disk contention. We should
     // experiment with throttling if that happens.
     if (!url_request.url().SchemeIsHTTPOrHTTPS()) {
       return START_REQUEST;
     }
 
     if (using_spdy_proxy_ && url_request.url().SchemeIs("http")) {
       return START_REQUEST;
     }
 
-    const net::HttpServerProperties& http_server_properties =
+    net::HttpServerProperties& http_server_properties =
         *url_request.context()->http_server_properties();
 
     if (url_request.priority() >= net::LOW ||
         !ResourceRequestInfo::ForRequest(&url_request)->IsAsync()) {
       return START_REQUEST;
     }
 
     net::HostPortPair host_port_pair =
         net::HostPortPair::FromURL(url_request.url());
 
@@ skipping 225 matching lines @@
   client->ReprioritizeRequest(
       request, old_priority_params, new_priority_params);
 }
 
 ResourceScheduler::ClientId ResourceScheduler::MakeClientId(
     int child_id, int route_id) {
   return (static_cast<ResourceScheduler::ClientId>(child_id) << 32) | route_id;
 }
 
 }  // namespace content