Add stub base::CurrentProcessInfo::CreationTime() implementation.

Bug: 726484, 881333
Change-Id: I9b779a087d20dda8f3f0a58ffb70fbbea1e6e601
Reviewed-on: https://chromium-review.googlesource.com/1210382Reviewed-by: Albert J. Wong <ajwong@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590120}

base/BUILD.gn

@@ -1430,6 +1430,7 @@ jumbo_component("base") {
       "process/memory_fuchsia.cc",
       "process/process_fuchsia.cc",
       "process/process_handle_fuchsia.cc",
+      "process/process_info_fuchsia.cc",
       "process/process_iterator_fuchsia.cc",
       "process/process_metrics_fuchsia.cc",
       "process/process_metrics_posix.cc",

base/process/process_info_fuchsia.cc

+// Copyright 2018 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/process/process_info.h"
+
+#include "base/time/time.h"
+
+namespace base {
+
+// static
+const Time CurrentProcessInfo::CreationTime() {
+  // TODO(https://crbug.com/726484): There is no syscall providing this data.
+  return Time();
+}
+
+}  // namespace base