Modify instrumentation for various jank bugs, mostly removing outdated sites.

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index 4f9f2f733053606a83d5d92f5180221d3b1caf32..4c3a0cb944f7f224f07fdb5f7a35632bf2f618d2 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -2172,20 +2172,15 @@ ResourceDispatcherHostImpl::GetLoadInfoForAllRoutes() {
 }
 
 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,