StackSamplingProfiler clean up

base/profiler/native_stack_sampler.cc

Index: base/profiler/native_stack_sampler.cc
diff --git a/base/profiler/native_stack_sampler.cc b/base/profiler/native_stack_sampler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8b4731b6cce2da861ce9ee25926de636e10efb86
--- /dev/null
+++ b/base/profiler/native_stack_sampler.cc
@@ -0,0 +1,13 @@
+// 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/native_stack_sampler.h"
+
+namespace base {
+
+NativeStackSampler::NativeStackSampler() {}
+
+NativeStackSampler::~NativeStackSampler() {}
+
+}  // namespace base