Run load state update timer only when needed

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/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
@@ skipping 987 matching lines @@
   Client* client = client_it->second;
   client->OnReceivedSpdyProxiedHttpResponse();
 }
 
 bool ResourceScheduler::IsClientVisibleForTesting(int child_id, int route_id) {
   Client* client = GetClient(child_id, route_id);
   DCHECK(client);
   return client->is_visible();
 }
 
+bool ResourceScheduler::HasLoadingClients() const {
+  for (auto& client : client_map_) {

[mmenke, 2015/05/21 15:53:25]

nit:  const auto& client

[Andre, 2015/05/21 22:05:39]

Done.

+    if (!client.second->is_loaded())
+      return true;
+  }
+  return false;
+}
+
 ResourceScheduler::Client* ResourceScheduler::GetClient(int child_id,
                                                         int route_id) {
   ClientId client_id = MakeClientId(child_id, route_id);
   ClientMap::iterator client_it = client_map_.find(client_id);
   if (client_it == client_map_.end()) {
     return NULL;
   }
   return client_it->second;
 }
 
@@ skipping 122 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