Upstream most of ios/web/net

ios/web/net/cookie_notification_bridge.mm

Index: ios/web/net/cookie_notification_bridge.mm
diff --git a/ios/web/net/cookie_notification_bridge.mm b/ios/web/net/cookie_notification_bridge.mm
new file mode 100644
index 0000000000000000000000000000000000000000..8ebb9a7bcf78e69c4def4ff78ccb1673292bbcc6
--- /dev/null
+++ b/ios/web/net/cookie_notification_bridge.mm
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+// Copyright 2014 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 "ios/web/net/cookie_notification_bridge.h"
+
+#import <Foundation/Foundation.h>
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "ios/net/cookies/cookie_store_ios.h"
+#include "ios/web/public/web_thread.h"
+
+namespace web {
+
+CookieNotificationBridge::CookieNotificationBridge() {
+  observer_.reset([[NSNotificationCenter defaultCenter]
+      addObserverForName:NSHTTPCookieManagerCookiesChangedNotification
+                  object:[NSHTTPCookieStorage sharedHTTPCookieStorage]
+                   queue:nil
+              usingBlock:^(NSNotification* notification) {
+                  OnNotificationReceived(notification);
+              }]);
+}
+
+CookieNotificationBridge::~CookieNotificationBridge() {
+  [[NSNotificationCenter defaultCenter] removeObserver:observer_];
+}
+
+void CookieNotificationBridge::OnNotificationReceived(
+    NSNotification* notification) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK([[notification name]
+      isEqualToString:NSHTTPCookieManagerCookiesChangedNotification]);
+  web::WebThread::PostTask(
+      web::WebThread::IO, FROM_HERE,
+      base::Bind(&net::CookieStoreIOS::NotifySystemCookiesChanged));
+}
+
+}  // namespace web