Some scaffolding for the task manager.

chrome/browser/cocoa/task_manager_mac.mm

+// 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/cocoa/task_manager_mac.h"
+
+#include <algorithm>
+#include <vector>
+
+#include "base/mac_util.h"
+
+////////////////////////////////////////////////////////////////////////////////
+// TaskManagerWindowController implementation:
+
+@implementation TaskManagerWindowController
+
+- (id)init {
+  NSString* nibpath = [mac_util::MainAppBundle()
+                        pathForResource:@"TaskManager"
+                                 ofType:@"nib"];
+  if ((self = [super initWithWindowNibPath:nibpath owner:self])) {
+    [[self window] makeKeyAndOrderFront:self];
+  }
+  return self;
+}
+
+@end
+
+////////////////////////////////////////////////////////////////////////////////
+// TaskManagerMac implementation:
+
+TaskManagerMac::TaskManagerMac()
+  : task_manager_(TaskManager::GetInstance()),
+    model_(TaskManager::GetInstance()->model()) {
+  window_controller_.reset([[TaskManagerWindowController alloc] init]);
+}
+
+// static
+TaskManagerMac* TaskManagerMac::instance_ = NULL;
+
+TaskManagerMac::~TaskManagerMac() {
+  task_manager_->OnWindowClosed();
+  model_->RemoveObserver(this);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TaskManagerMac, TaskManagerModelObserver implementation:
+
+void TaskManagerMac::OnModelChanged() {
+}
+
+void TaskManagerMac::OnItemsChanged(int start, int length) {
+}
+
+void TaskManagerMac::OnItemsAdded(int start, int length) {
+}
+
+void TaskManagerMac::OnItemsRemoved(int start, int length) {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TaskManagerMac, public:
+
+// static
+void TaskManagerMac::Show() {
+  if (instance_) {
+    // If there's a Task manager window open already, just activate it.
+    [[instance_->window_controller_ window]
+        makeKeyAndOrderFront:instance_->window_controller_];
+  } else {
+    instance_ = new TaskManagerMac;
+    instance_->model_->StartUpdating();
+  }
+}