Remove unnecessary instrumentation for several jank bugs.

extensions/browser/api/socket/socket_api.cc

 // Copyright 2014 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 "extensions/browser/api/socket/socket_api.h"
 
 #include <vector>
 
 #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"
 #include "extensions/browser/api/socket/socket.h"
 #include "extensions/browser/api/socket/tcp_socket.h"
 #include "extensions/browser/api/socket/tls_socket.h"
 #include "extensions/browser/api/socket/udp_socket.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/permissions/permissions_data.h"
@@ skipping 184 matching lines @@
       addresses_.get(),
       base::Bind(&SocketExtensionWithDnsLookupFunction::OnDnsLookup, this),
       request_handle_.get(),
       net::BoundNetLog());
 
   if (resolve_result != net::ERR_IO_PENDING)
     OnDnsLookup(resolve_result);
 }
 
 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();
   } else {
     error_ = kDnsLookupFailedError;
   }
   AfterDnsLookup(resolve_result);
 }
 
 SocketCreateFunction::SocketCreateFunction()
@@ skipping 855 matching lines @@
   } else {
     RemoveSocket(params_->socket_id);
     error_ = net::ErrorToString(result);
   }
 
   results_ = core_api::socket::Secure::Results::Create(result);
   AsyncWorkCompleted();
 }
 
 }  // namespace extensions