Refactor CallStackProfile::Params into base/ for use over IPC.

base/metrics/call_stack_profile_params.cc

+// 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/metrics/call_stack_profile_params.h"
+
+namespace base {
+
+CallStackProfileParams::CallStackProfileParams(
+    base::CallStackProfileParams::Trigger trigger)
+    : CallStackProfileParams(trigger, false) {}
+
+CallStackProfileParams::CallStackProfileParams(
+    base::CallStackProfileParams::Trigger trigger,
+    bool preserve_sample_ordering)
+    : trigger(trigger), preserve_sample_ordering(preserve_sample_ordering) {}
+
+CallStackProfileParams::CallStackProfileParams()
+    : CallStackProfileParams(base::CallStackProfileParams::UNKNOWN, false) {}
+
+}  // namespace base