Add more ScopedTrackers to track down jank in the RDH

content/browser/loader/resource_dispatcher_host_impl.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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <algorithm>
 #include <set>
@@ skipping 2144 matching lines @@
     }
   }
 }
 
 scoped_ptr<ResourceDispatcherHostImpl::LoadInfoMap>
 ResourceDispatcherHostImpl::GetLoadInfoForAllRoutes() {
   // Populate this map with load state changes, and then send them on to the UI
   // thread where they can be passed along to the respective RVHs.
   scoped_ptr<LoadInfoMap> info_map(new LoadInfoMap());
 
+  tracked_objects::ScopedTracker tracking_profile0(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "455952 ResourceDispatcherHostImpl::GetLoadInfoForAllRoutes0"));
+
   for (const auto& loader : pending_loaders_) {
     // Also poll for upload progress on this timer and send upload progress ipc
     // messages to the plugin process.
     {
       // TODO(pkasting): Remove ScopedTracker below once crbug.com/455952 is
       // fixed.
       tracked_objects::ScopedTracker tracking_profile1(
           FROM_HERE_WITH_EXPLICIT_FUNCTION(
               "455952 ResourceDispatcherHostImpl::GetLoadInfoForAllRoutes1"));
       loader.second->ReportUploadProgress();
@@ skipping 51 matching lines @@
   // fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "455952 ResourceDispatcherHostImpl::UpdateLoadInfo"));
 
   scoped_ptr<LoadInfoMap> info_map(GetLoadInfoForAllRoutes());
 
   if (info_map->empty())
     return;
 
+  tracked_objects::ScopedTracker tracking_profile2(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "455952 ResourceDispatcherHostImpl::UpdateLoadInfo2"));
+
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&ResourceDispatcherHostImpl::UpdateLoadInfoOnUIThread,
                  base::Passed(&info_map)));
 }
 
 void ResourceDispatcherHostImpl::BlockRequestsForRoute(int child_id,
                                                        int route_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   GlobalRoutingID key(child_id, route_id);
@@ skipping 149 matching lines @@
 
   // Add a flag to selectively bypass the data reduction proxy if the resource
   // type is not an image.
   if (request_data.resource_type != RESOURCE_TYPE_IMAGE)
     load_flags |= net::LOAD_BYPASS_DATA_REDUCTION_PROXY;
 
   return load_flags;
 }
 
 }  // namespace content