Port parts of base/process_util to Linux.

base/process_posix.cc

Index: base/process_posix.cc
===================================================================
--- base/process_posix.cc	(revision 0)
+++ base/process_posix.cc	(revision 0)
@@ -0,0 +1,48 @@
+// Copyright (c) 2008 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.h"
+#include "base/logging.h"
+#include "base/process_util.h"
+
+bool Process::IsProcessBackgrounded() {
+  return false;
+}
+
+bool Process::SetProcessBackgrounded(bool value) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool Process::ReduceWorkingSet() {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool Process::UnReduceWorkingSet() {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool Process::EmptyWorkingSet() {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+int32 Process::pid() const {
+  if (process_ == 0)
+    return 0;
+
+  return process_util::GetProcId(process_);
+}
+
+bool Process::is_current() const {
+  return process_ == process_util::GetCurrentProcessHandle();
+}
+
+// static
+Process Process::Current() {
+  return Process(process_util::GetCurrentProcessHandle());
+}
+