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..39e41a0f6f7de3bdd4ce3fa351edac648dca4253
--- /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 {
+
+StackSamplingProfiler::NativeStackSampler::NativeStackSampler() {}
+
+StackSamplingProfiler::NativeStackSampler::~NativeStackSampler() {}
+
+}  // namespace base