Remove unnecessary instrumentation for several jank bugs.

net/disk_cache/cache_creator.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.
 
 #include "base/files/file_path.h"
 #include "base/metrics/field_trial.h"
-#include "base/profiler/scoped_tracker.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "net/base/cache_type.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/blockfile/backend_impl.h"
 #include "net/disk_cache/cache_util.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/disk_cache/memory/mem_backend_impl.h"
 #include "net/disk_cache/simple/simple_backend_impl.h"
 
@@ skipping 115 matching lines @@
     LOG(ERROR) << "Unable to create cache";
     created_cache_.reset();
   }
   callback_.Run(result);
   delete this;
 }
 
 // If the initialization of the cache fails, and |force| is true, we will
 // discard the whole cache and create a new one.
 void CacheCreator::OnIOComplete(int result) {
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("422516 CacheCreator::OnIOComplete"));
-
   if (result == net::OK || !force_ || retry_)
     return DoCallback(result);
 
   // This is a failure and we are supposed to try again, so delete the object,
   // delete all the files, and try again.
   retry_ = true;
   created_cache_.reset();
   if (!disk_cache::DelayedCacheCleanup(path_))
     return DoCallback(result);
 
@@ skipping 30 matching lines @@
                                            backend_type,
                                            kNone,
                                            thread,
                                            net_log,
                                            backend,
                                            callback);
   return creator->Run();
 }
 
 }  // namespace disk_cache