Remove unnecessary instrumentation for several jank bugs.

extensions/browser/api/socket/socket_api.cc

Index: extensions/browser/api/socket/socket_api.cc
diff --git a/extensions/browser/api/socket/socket_api.cc b/extensions/browser/api/socket/socket_api.cc
index 74aee9565a7be38e6143be5ec59a0cc1dae38dd6..881ae6ce290020fa779095dbdbb1891ee98c5e27 100644
--- a/extensions/browser/api/socket/socket_api.cc
+++ b/extensions/browser/api/socket/socket_api.cc
@@ -8,7 +8,6 @@
 
 #include "base/bind.h"
 #include "base/containers/hash_tables.h"
-#include "base/profiler/scoped_tracker.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/resource_context.h"
 #include "extensions/browser/api/dns/host_resolver_wrapper.h"
@@ -213,11 +212,6 @@ void SocketExtensionWithDnsLookupFunction::StartDnsLookup(
 }
 
 void SocketExtensionWithDnsLookupFunction::OnDnsLookup(int resolve_result) {
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "436634 SocketExtensionWithDnsLookupFunction::OnDnsLookup"));
-
   if (resolve_result == net::OK) {
     DCHECK(!addresses_->empty());
     resolved_address_ = addresses_->front().ToStringWithoutPort();