Revert of Temporary commit to evaluate perf impact of prototype CPU profiler

base/profiler/cpu_profiler_posix.cc

Index: base/profiler/cpu_profiler_posix.cc
diff --git a/base/profiler/cpu_profiler_posix.cc b/base/profiler/cpu_profiler_posix.cc
deleted file mode 100644
index f1ec5115f27a983a0838813c1a2054b3463cd039..0000000000000000000000000000000000000000
--- a/base/profiler/cpu_profiler_posix.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2015 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/profiler/cpu_profiler.h"
-
-namespace base {
-
-CpuProfiler::CpuProfiler() {}
-
-CpuProfiler::~CpuProfiler() {}
-
-// static
-bool CpuProfiler::IsPlatformSupported() {
-  return false;
-}
-
-void CpuProfiler::OnTimer() {}
-
-}