Remove unnecessary instrumentation for several jank bugs.

components/nacl/browser/pnacl_translation_cache.cc

 // Copyright 2013 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 "components/nacl/browser/pnacl_translation_cache.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
-#include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/thread_checker.h"
 #include "components/nacl/common/pnacl_types.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/disk_cache.h"
 
 using base::IntToString;
 using content::BrowserThread;
@@ skipping 211 matching lines @@
   } else {
     if (!write_callback_.is_null()) {
       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE, base::Bind(write_callback_, rv));
     }
   }
   cache_->OpComplete(this);
 }
 
 void PnaclTranslationCacheEntry::DispatchNext(int rv) {
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "422516 PnaclTranslationCacheEntry::DispatchNext"));
-
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!cache_)
     return;
 
   switch (step_) {
     case UNINITIALIZED:
     case FINISHED:
       LOG(ERROR) << "DispatchNext called uninitialized";
       break;
 
@@ skipping 185 matching lines @@
 }
 
 int PnaclTranslationCache::DoomEntriesBetween(
     base::Time initial,
     base::Time end,
     const CompletionCallback& callback) {
   return disk_cache_->DoomEntriesBetween(initial, end, callback);
 }
 
 }  // namespace pnacl