Revert of Profiler-instrumentation of the startup time

chrome/app/chrome_main.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 "chrome/app/chrome_main_delegate.h"
 
-#include "base/profiler/scoped_tracker.h"
-#include "chrome/common/chrome_version_info.h"
 #include "content/public/app/content_main.h"
 
 #if defined(OS_WIN)
 #include "base/debug/dump_without_crashing.h"
 #include "base/win/win_util.h"
 #include "chrome/common/chrome_constants.h"
 
 #define DLLEXPORT __declspec(dllexport)
 
 // We use extern C for the prototype DLLEXPORT to avoid C++ name mangling.
@@ skipping 39 matching lines @@
   typedef void (__cdecl *DumpProcessFunction)();
   DumpProcessFunction DumpProcess = reinterpret_cast<DumpProcessFunction>(
       ::GetProcAddress(::GetModuleHandle(chrome::kBrowserProcessExecutableName),
           "DumpProcessWithoutCrash"));
   base::debug::SetDumpWithoutCrashingFunction(DumpProcess);
 #else
   params.argc = argc;
   params.argv = argv;
 #endif
 
-  // TODO(vadimt): Remove the switch statement below once crbug.com/453640 is
-  // fixed.
-  // Enable profiler instrumentation depending on the channel.
-  switch (chrome::VersionInfo::GetChannel()) {
-    case chrome::VersionInfo::CHANNEL_UNKNOWN:
-    case chrome::VersionInfo::CHANNEL_CANARY:
-      tracked_objects::ScopedTracker::Enable();
-      break;
-
-    case chrome::VersionInfo::CHANNEL_DEV:
-    case chrome::VersionInfo::CHANNEL_BETA:
-    case chrome::VersionInfo::CHANNEL_STABLE:
-      // Don't enable instrumentation.
-      break;
-  }
-
   int rv = content::ContentMain(params);
 
 #if defined(OS_WIN)
   base::win::SetShouldCrashOnProcessDetach(false);
 #endif
 
   return rv;
 }