Mac: Create a pid->task_t mapping in the browser process.

chrome/browser/mach_broker_mac.cc

+// Copyright (c) 2009 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 "chrome/browser/mach_broker_mac.h"
+
+#include "base/logging.h"
+
+// Returns the global MachBroker.
+MachBroker* MachBroker::instance() {
+  return Singleton<MachBroker>::get();
+}
+
+// Adds mach info for a given pid.
+void MachBroker::RegisterPid(
+    base::ProcessHandle pid, const MachInfo& mach_info) {
+  AutoLock lock(lock_);
+  DCHECK_EQ(0u, mach_map_.count(pid));
+  mach_map_[pid] = mach_info;
+}
+
+// Removes all mappings belonging to |pid| from the broker.
+void MachBroker::Invalidate(base::ProcessHandle pid) {
+  AutoLock lock(lock_);
+  mach_map_.erase(pid);
+}
+
+// Returns the mach task belonging to |pid|.
+mach_port_t MachBroker::TaskForPid(base::ProcessHandle pid) const {
+  AutoLock lock(lock_);
+  MachBroker::MachMap::const_iterator it = mach_map_.find(pid);
+  if (it == mach_map_.end())
+    return MACH_PORT_NULL;
+  return it->second.mach_task_;
+}