Monitor sleep/wake on Mac. Should fix some networking issues arising after sl...

app/system_monitor_mac.mm

+// Copyright (c) 2010 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 "app/system_monitor.h"
+
+#import <AppKit/AppKit.h>
+
+@interface SystemMonitorBridge : NSObject {
+ @private
+  SystemMonitor* systemMonitor_;  // weak
+}
+
+- (id)initWithSystemMonitor:(SystemMonitor*)monitor;
+- (void)computerDidSleep:(NSNotification*)notification;
+- (void)computerDidWake:(NSNotification*)notification;
+
+@end
+
+@implementation SystemMonitorBridge
+
+- (id)initWithSystemMonitor:(SystemMonitor*)monitor {
+  self = [super init];
+  if (self) {
+    systemMonitor_ = monitor;
+
+    // See QA1340
+    // <http://developer.apple.com/library/mac/#qa/qa2004/qa1340.html> for more
+    // details.
+    [[[NSWorkspace sharedWorkspace] notificationCenter]
+        addObserver:self
+           selector:@selector(computerDidSleep:)
+               name:NSWorkspaceWillSleepNotification
+             object:nil];
+    [[[NSWorkspace sharedWorkspace] notificationCenter]
+        addObserver:self
+           selector:@selector(computerDidWake:)
+               name:NSWorkspaceDidWakeNotification
+             object:nil];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [[[NSWorkspace sharedWorkspace] notificationCenter]
+      removeObserver:self];
+  [super dealloc];
+}
+
+- (void)computerDidSleep:(NSNotification*)notification {
+  systemMonitor_->ProcessPowerMessage(SystemMonitor::SUSPEND_EVENT);
+}
+
+- (void)computerDidWake:(NSNotification*)notification {
+  systemMonitor_->ProcessPowerMessage(SystemMonitor::RESUME_EVENT);
+}
+
+@end
+
+void SystemMonitor::PlatformInit() {
+  system_monitor_bridge_ =
+      [[SystemMonitorBridge alloc] initWithSystemMonitor:this];
+}
+
+void SystemMonitor::PlatformDestroy() {
+  [system_monitor_bridge_ release];
+}