Modify instrumentation for various jank bugs, mostly removing outdated sites.

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 2154 matching lines @@
 
     if (existing == info_map->end() ||
         LoadInfoIsMoreInteresting(load_info, existing->second)) {
       (*info_map)[id] = load_info;
     }
   }
   return info_map.Pass();
 }
 
 void ResourceDispatcherHostImpl::UpdateLoadInfo() {
-  // TODO(pkasting): Remove ScopedTracker below once crbug.com/455952 is
-  // 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"));
+  // TODO(pkasting): Remove ScopedTracker below once crbug.com/455952 is
+  // fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION("455952 BrowserThread::PostTask()"));
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&ResourceDispatcherHostImpl::UpdateLoadInfoOnUIThread,
                  base::Passed(&info_map)));
 }
 
 void ResourceDispatcherHostImpl::BlockRequestsForRoute(int child_id,
                                                        int route_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
@@ skipping 150 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